I was going down a straight at probably 80kph where there are quite a few bumps in the sand. All of a sudden it felt like the front bars were going from side to side so dramatically out of control that I thought I was going to fall off, but didn't (saved it) . My Riding buddy said that the bike was wobbling all over the place from what he could see from riding behind me. I thought it might have been because I was going too fast and not squeezing my knees to the bike and made it loosey?

This has happened about 3 times now and I would love to know how to stop it from happening as I get freaked out now everytime I come across these bumpy straights. I cannot believe I haven't flipped off yet from this!!!