The whole different dimension is good fun. How many laps did you do in the 40 minutes? I did a run at it the other day & I think I managed 22 laps. The first few laps were a bit ropey though.
Edit: 22 laps must be a mistake, the lap times were between 1:56 & 1:59 so it was probably just 20 or 21.
Last edited: Oct 20, 2015