Mesh flickering problem [video included]

Hello. I am creating a FPS game, but early I have found a problem. The arms are flickering for some reason. I don’t know why at all. Here is a video if you don’t know what I mean.

Video Here

Figured it out. Turns out Unity doesn’t like stretched and dynamic meshes. If you look at the beginning of the video, my guy is all stretched out. I moved him back and it fixed it.