Brendan Walker has arranged for various people with an interest in rides, thrills, etc, to do brief presentations, then we bring out the telemetry equipment, which allows us to monitor facial expression, heart rate, breathing, etc, all in real time via Bluetooth, and we send some poor sucker on a fairground ride out in the Science Museum's back yard, while the audience watches. Then we let the audience outside to experience the ride themselves. We've actually been getting some interesting data -- it appears the subjects' heart rates are highest in anticipation of riding. It drops during the actual ride. Who knew? The release form for the riders is printed on a sick bag.