What are the things hanging off the handlebars in FMX?

Question

in the middle of a run, what are the things mounted on the handlebars that FMX riders push forward and pull back by the brake and clutch?

Answer 1

Raccoon Tails

Answer 2

there called bark busters.they stop you from hurting your hands

Answer 3

they are just like bars their wrists hit so when they do tricks like kiss of death or the ruler their wrist hits the bar and they don't go too far forward and can pull themselves back. Sometimes they want them there for a trick other times they want them out of the way. So that's why you see them move them