Video has emerged of the aftermath of a roller coaster crash at Alton Towers that left four people seriously injured and required the attention of the fire service, paramedics, four ambulances and an air ambulance.
Park officials confirmed that two males and two females were injured on The Smiler rollercoaster, which opened two years ago and features 14 loops.
A spokesperson for Alton Towers said there were 16 people involved in the incident "on a low section of the track", which occurred between a full carriage and one that was empty.
Video has emerged from an onlooker at Alton Towers shortly after the crash on the Smiler took place. As one of the carriages can be seen rocking back and forth on the track, frightened and panicked passengers can be heard swearing and screaming: "Help us" and "Stop this f***ing ride."
Watch the video below:
An Alton Towers spokeswoman said: "The resort's fully qualified first responders were on the scene immediately to assist with the evacuation which is ongoing, and the area has been closed to allow for access to emergency services vehicles.
"There will be a full investigation once we have recovered the guests who are our priority."
The Smiler opened in May 2013 holds the official Guinness World Record for most loops in a rollercoaster, according to the Alton Towers website.
In July 2013, the ride was closed after reports that a bolt was seen to have fallen from the track.
And in November that year the rollercoaster was again closed after plastic guard wheels came loose and hit front row riders.
The best roller coasters in the world
The best roller coasters in the world
1/9 Millennium Force, USA
Breaking six world records when it was built in 2000, Millennium Force at Cedar Point in Ontario, United States, was briefly the tallest and fastest coaster in the world before Steel Dragon 2000. Millennium Force was also the world’s first Giga Coaster, exceeding 300 feet in height. Website: https://www.cedarpoint.com/ Ticket cost: £29.24
2/9 Formula Rossa, Abu Dhabi
Formula One fans looking to experience the thrill of high-speed manoeuvres need look no further than Formula Rossa, currently the world’s fastest roller coaster, located at Ferrari Word in Abu Dhabi, United Arab Emirates. Once strapped in to the Ferrari “Rosso Scuderia” F1 inspired cockpit, riders experience an incredible top speed of 150mph, accompanied by acceleration G-Force of 1.7Gs. In order to accelerate to top speed in under five seconds, the ride uses a hydraulic launch system similar to those used to launch jets from aircraft carriers. The ride is so fast riders are required to wear safety goggles. Website: http://www.ferrariworldabudhabi.com/en-gb.aspx Entry cost: £38.18
3/9 Kingda Ka, USA
Currently the world’s tallest roller coaster, Kingda Ka reaches an impressive height of 456 feet. The roller coaster, found at Six Flags Great Adventure in Jackson, New Jersey, in the United States, used to be the world’s fastest roller coaster, reaching 128 miles per hour in 3.5 seconds, before it lost that record to Formula Rossa in 2010. After a 90° rise to the top, riders then plummet down a 270 ° spiral drop. Website: https://www.sixflags.com/greatadventure Entry cost: £24.54
4/9 Colossos, Germany
The world’s tallest wooden roller coaster, Colossos in Heide Park, Germany, stretches 196 feet into the air. It is constructed using laser cut wood, which means the entire structure snaps together like pieces of Lego. Due to this, the wooden track gives a very smooth ride. Website: http://www.heide-park.de/en/heide-park/ Entry cost: £25.45
5/9 Steel Dragon 2000, Japan
Named after the Chinese New Year in 2000, Steel Dragon 2000 at Nagashima Spa Lad amusement park in Mie Prefecture, Japan, holds the record for the longest roller coaster in the world. Boasting a track length of 8,133 feet, it’s also the sixth fastest coaster in the world. Built in Japan, the coaster needed extra earthquake protection, pushing construction costs over $50 million. Website: http://www.nagashima-onsen.co.jp/index.html/ Ticket cost: £5.74
6/9 Takabisha, Japan
Famous for having a drop angle of 121°, Takabisha, located at the Fuji-Q Highland theme park in Fujiyoshida, Yamanashi, Japan, is the steepest roller coaster in the world. The drop angle is known as a “beyond vertical” drop as riders travel back on themselves as they fly over the vertical lift and down the drop. Website: http://www.fujiq.jp/en/ Ticket cost: 5.74
7/9 Top Thrill Dragster, USA
Before being surpassed by Kingda Ka, Top Thrill Dragster at Cedar Point in Sandusky, Ohio, United States, was the world’s tallest roller coaster. Along with Kingda Ka, Top Thrill Dragster is one of two Strata Coaster types of roller coaster, featuring a drop of 400 feet and a full circuit. Reaching speeds of 120 mph in less than four seconds, Top Thrill Dragster may last only 17 seconds, but it’s sure to thrill. Website: https://www.cedarpoint.com/ Entry cost: £29.18
8/9 Space Mountain, USA
A clear fan favourite, Space Mountain, at Disney World, California, takes visitors on a rocket ride through stars, galaxies and asteroids. The ride is replicated across all five Magic Kingdom-style Disney Parks, so there’s no excuse to miss it. Website: https://disneyland.disney.go.com/ Entry cost: £56.15
This one’s a bit of a cheat because the ride isn’t actually completed yet, but Skyscraper at Orlando’s International Drive is planned to be the world’s tallest roller coaster in the world with a 570 foot tower. Riders will catch an elevator to the top of the structure before following the winding track down at 65 miles per hour. Unfortunately, the ride won’t be completed until 2016, but there’s still plenty of time to get excited.