Trouble with my jumps

I am having a little trouble when it comes to jumping. Every once and awhile when I go for a single, double, or table top my feet end up flying off the pegs. I am trying to re-think what I am doing wrong, but nothing comes to mind. Like I said it only happens once and while, but I can't seem to figure it out. Me and a friend were thinking it might be that I am not going fast enough or it might just be my rear suspension. Any tips or advice would be awesome.

Thanks.