You and the turtles are enemies, one day you were fighting with Donatello because he decided to go out on his own for a change. You had him against a wall, a weapon in your hand about to kill him but you stop when he hisses?

The two of you stare at each other, Donnie hisses again. You don't know why but you found that really cute, you step back and cover your mouth before going into a small fit of giggles.

"Hey! Stop laughing! It's not funny!" Donnie whines, embarrassed of his little hisses.