When I was taking my motorcycle training(to get cheaper insurance, back riding after 15 years of not) One task we had to do was accelerate to 60 km's/hr(about 40 mph) watch an instructor in front of you point left or right and you had to brake and avoid by turning the way he pointed... Sounds easy enough, except they also teach us to turn off our fuel petcock every time you leave the bike.. So I come back from a break, its my turn to do the test and halfway up to speed my bike bogs down......had to reach down quick and turn on the fuel while still trying to acheive that minimum speed for the test...I did it, but did not get up to a fast enough speed, I failed that test, was humiliated by "rookie riders", but I did pass the course...