Fastest I've gone downhill is about 30. That's fast enough for me. My bollocks don't slow me down at all.
i managed to do the exact same bike trick , but without the use of Drugs . Just set off from work with my jacket over my handlebars , the arm dropped into the forks and collected around the brake , luckily for me i was going quite slow (i was probably due a doping test) and in a comical slow motion i went over the handlebars landing on my feet like a crab . Only embarrassment was a work mate drove past at that exact time
Evidence suggests it will make very little difference. [video=youtube_share;ytRxErCPgbk]http://youtu.be/ytRxErCPgbk[/video]