Massive recoil

How do you make a SWEP that literally propels you in the opposite direction of which you are looking? Like 200 units back.

Pleaaaaaseeeee! just like this:

   0
  /|\KERBLOOEY-------------------------------------------------------------------------->
   /\                                                         200m

Use a bomb, problem sorted.

Please, Please, PLEASE use the wiki…

The damn example is what you want -.-

Thanks, shoot me if you want for my stupidity!