The front door to the clinic clicked open quietly, a spiky-haired shadow slipping inside and padding up the stairs without a sound. He'd settle the score with that Kurosaki kid once and for all.
His hand reached for the doorknob to the boy's room. Bash his head in, get out quick and-
"Ichigoooooooooo!"
Grimmjow never saw the roundhouse kick that hit him squarely in the face. Wham.
"Why are you home so late? Were you out with a girl! My son has finally become a man! I'm so happy I could-"
The hall light was snapped on by a grouchy and barely-awake Karin, revealing Kurosaki Isshin throttling the life out of one Grimmjow Jaegerjaquez, would-be assassin.
"...You're not Ichigo."
Meh, I don't think this is the best that I've written, but I found it in an old notepad and thought it was reasonably funny ^^
~Featherz