Bart's big brother, Tom (Phil Hartman) ends up fighting and injuring Homer at the aquarium.
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The Simpsons Season 4 Episode 14 Quotes

Bart: Remember when Tom had you in that headlock and you screamed, "I'm a hemophiliac!," and when he let you go, you kicked him in the back?
Homer: Yeah.
Bart: Will you teach me how to do that?
Homer: Sure, boy. First, you gotta shriek like a woman and keep sobbing until he turns away in disgust. That's when it's time to kick some back. And then when he's lying down on the ground,...
Bart: Yeah.
Homer: Kick him in the ribs.
Bart: Yeah.
Homer: Step on his neck.
Bart: Yeah.
Homer: And run like hell.

You're not the only one who can abuse a non-profit organization!

Homer