Bike crashes don’t seem as bad as car crashes at first. People often wear helmets, and they usually don’t go nearly as fast as cars do. However, the popularity of BMX and the stupidity of the average person (often multiplied by the inclusion of alcohol) makes biking a dangerous hobby when done incorrectly. The following gifs involve professional bike riders crashing, kids trying dumb stuff, freak accidents, stunts gone wrong, and more. Let these gifs be a reminder that you should always wear a helmet on your bike, especially when you’re about to tempt something stupid. Click through the slideshow for some of the best, funniest, and scariest bike fails.