Contemplation of the curb after it throttles on its own! I work on all legal bikes. I just restored a FS MTB Stumpjumper. Yesterday I assembled an all steel eBike from India. The cranks were cast iron and as heavy as a frying pan. I will be replacing the twist throttle soon with a push in type thumb throttle. Twist throttles are insanity. If you are walking the bike and bump it, it will go flying into the air as the throttle gets twisted more as it rises. If the grip on a twist is against the throttle it will stay on. Carma works as well as, and in conjunction with the Darwin Awards.