Two IFP animations made by the user "GLaP" back in 2013 I found on youtube just looking up. There's two versions:

"What's the difference?"

On version 1: Cj/Player only shoots with 1 hand once he reached "Hitman" skill level with the Desert Eagle.

On version 2: CJ/PLayer shoots with 1 hand even on poor skill level, however this version seems to be bugged? or so it appears to me.

Decided to upload them in order to save this fantastic animation from becoming lost media. I've included 3 pictures of my own alongside the Original 4 pictures made by GLaP.