These are just some fun fangirl-things I found online. (Mainly memes.)
That one bugs me a bit because it's Camp Half-Blood, not "The Half-Blood Camp".
When Percy, Annabeth, and Grover had to go to the Underworld
Underworld security guard dude: So, how did you die?
Percy: We err... drowned in a bathtub.
Underworld security guard dude: All three of you?
Percy: It was a big bathtub.
What was your favorite? Most were Percy Jackson, some were Warriors. I love the "It was a really big bathtub." one. :P
~Tenley (Who is about to go make a better signature.)