When no one turns up when I'm playing a shooter, I'll say things like, "What? doesn't anyone wanna play with me? Come out, come out wherever you are..."
"Where is everyone? The parties over here!"
If I'm playing online with an idiot, I'll say things like, "Oh, well done for walking into some fire, dipshit" and continue playing until the times up.
I also think about what's happening in the game, and make it funny, like Wesker running on clutching a KFC bucket and I start laughing at myself.
Perhaps I'm insane?