In Unreal Tournament, the flak cannon's secondary fire is like a flack shell. I felt the same way as you. At first I thought I was hallucinating. I would tell myself, "This is bad, Lib, you are so desensitized that yellow smiley faces appear in your head when your character explodes in a game. I hope this doesn't have full-life consequences (

)".
Then, one day, my game froze just before I ate a flak shell, and I saw it; a yellow smiley face-->

smiling at my soon to be chummed body.
Edit: lol, I forgot to write, yes, there is a skull on the gauss shell.