yeah, that was Sam placing her stake. She'd yet to be accepted as one of the team, said something like 'just because my reproductive organs are on the inside instead doesn't mean I can't face the same crap you can'.
Just before that she butt heads w/ Kowalski;
Carter: "Don't worry, I played w/ dolls."
Kowalski: "What,,, G.I. Joe?" <snicker>
Carter: ".....Major Matt Mason." <stares>
Another funny from SG-1. Whenever Bratak, Teal'c's mentor would meet Gen. Hammond he would motion around his own head, indicating baldness, while greeting; "Hammond... of Texas"
Part sci-fi nerd here.
How about Smallville;
James Marsters (Who played Spike in Buffy) character Braniac, saying to Clark Kent. "Clark,,, there's no such thing, as Vampires"
a neat in-joke