The X-Factor is Sean Waltman's signature move. Give me a few seconds, I'll watch YouTube and see if I can describe it.

few seconds pass*

As per this video, it looks like the X-Factor is simply a run of the mill sitting facebuster. He basically grabs the opponents head, jumps up, opponent jumps too, then he slams their face into the mat, in a seated position. He starts it off with a kick to the gut. Basically, the IP user would like a link to a wrestling move page, complete with a description of the move. 199.212.27.249