This entire video is only 244 frames long!
At January 15 I found the map, next day I animated Right scientist, and the next day I animated everything else including the explosion!
I managed to make this scene entirely in Gmod again.
On this GIF you can see this walking Scientist on the background - he is the one who explodes onto pieces. I used transparent texture to make him invisible. And this little block I put on the floor, is like a "Safety" - just prevents this gun from killing this scientist when I don't need to.
When Left scientist is making his uppercut - the gun shoots automatically this exact frame. Right scientist disappearing, and exploding replaces him.
The gun aiming this scientist just perfectly.
Every time I was recording this - I had only one attempt to shoot this scene right, or I'll need to reload savefile, or put transparent scientist back on his place cleaning all the blood particles. Anyway one of the first attempts made it to the video!
C: