6. Spider-Man - A New Man
In the Buffy episode "A New Man", Rupert Giles is transformed in to a demon by his old friend/nemesis Ethan Rayne. In the end, Buffy is going to kill Giles because, unaware of his transformation, she thinks the demon he turned in to is responsible for his disappearance. Ultimately, she realises the demon is Giles and Ethan Rayne is held responsible and taken away by Riley Finn's men. As a result, this dialogue occurs...
Riley Finn: "I told you I'd help."
Buffy Summers: "You did. If I'd had gotten here any later and if Giles had killed Ethan, I... never would have gotten him back."
Riley Finn: "You'd find some other way. You're really strong. Like Spider-Man strong."
Buffy Summers: "Yeah. But I don't stick to stuff. But... yeah." Riley is obviously referring to the Marvel icon Spider-Man, who is in fact far stronger than Buffy in terms of the level of physical strength he has displayed over his history, but it was a nice compliment anyway (exaggerated or not).