hey, get a watch with a stopwatch function, start it, wait till 10 seconds after you press it (you press it at 00:00:00 and start at 00:00:10) and when you finish wait about 10 seconds after you finish the run and stop it (finish at 00:07:32 stop it at 00:07:42) and just take 20 seconds of the final thingy, it's not super accurate but it gives you an approx. time