Rider spoke, Barbican, London

Outdoor venue, a one-woman show – in some ways, Rider Spoke was like many theatrical experiences I've had. But this time, I was the cast and audience of an hour-long combination of theatre and "game play" created by Blast Theory, with a view to exploring the "emotional and intellectual resonances of the city".

A computer loaded with their instructions was handed to me in the Barbican, next to a painting of the Madonna captioned: "We pray to the Virgin to keep all the riders safe as they cycle around the city at night." Somehow this failed to reassure me.

During my ride, I would have to find places to hide, where I would read or listen to a question and choose whether to record an answer or listen to someone else's response. Once I was on my bike and on the road, the more important choice seemed to be whether I should try to make it to retirement age or just kill myself right now, as I cycled in a darkening central London, with a bright screen of animated graphics and an earpiece that kept falling out.

I stopped at the first hiding place I saw, a brewery loading-bay, where I read the first question: "Describe yourself." "I am tall," I said slowly into the mic. "I am wary." I looked around for inspiration. "I like beer." Swallows whirled round the screen and aligned themselves in what seemed to be attack formation. Fending off advances of an unknown nature from three youths, I made it to Finsbury Square, which I decided would be my own little cyber-city.

At my next stop, a phone box, I decided to listen to Martin's reply to "Imagine holding the hand of someone. Find a place and tell me how it feels." Martin sounded even warier: "I don't know London all that well. So... I've been told to imagine holding the hand of someone and find a place and say how it feels... yeah."

Hiding next to a rose bush, I tuned in to Lucy's reply to "Find me a stinking arsehole of a spot and tell me about it." She felt it was "really, really unfair" that people had to live in horrible council estates.

Then, I listened to a voice ask a longer version of the next question: "Think of something you've never been able to tell. Think of how it shames you... Tell me what your life would be like without your secret."

As I said, I am wary, so my secret will remain a mystery. But my opinion of Rider Spoke I think you can guess.