Hee! You totally know they would be drunk as they traipse about on the ledges. And you know that Lancelot's going to fall off and land in the bushes. Tristan wouldn't lose his balance no matter how drunk he is, but Lancelot's going to latch on to him before he goes down.

When Arthur asks Lancelot about where all the scratches came from, he's going to tell him it was a cat. Arthur will be dubious, but will decide that he doesn't really want to know. When people ask Tristan why he's limping, he's going to give them a Look, and they're going to shut their mouths and walk away (and then gossip among themselves as to why it is that Tristan is wearing glitter nail polish).