From "The Great Jungle Gym Standoff":
Spinelli: Last one on Ole' Rusty has to give Ms. Finster a sponge bath!
Randall: Hey, that's my job!
- Here's another one from the same episode
T.J.: Ol' Rusty was here when my big brother was in school!
Spinelli: Ol' Rusty was here when my mom was in school!
Mikey: Heck, Ol' Rusty was here when my great-uncle Mary was in school!
Vince: Your uncle Mary?
Gretchen: Don't ask.
- So either Mikey's great-uncle was a male-to-female transsexual or he was given a girl's name and (for reasons unknown) decided not to change it.
- This can also double as a Shout-Out to The Dark Is Rising - "Over Sea Under Stone" begins with the kids visiting their Great-Uncle Merry.