Aang: Don't touch that!
Zuko: Why not?
Aang: Remember those spikes? Its probably another trap!
Zuko: So?
Aang: I'm just very suspicious of giant glowing gems sitting on pedestals
Zuko: *removes the gem*
Aang: *facefaults*
*shortly after the two are stuck to the ceiling with the glue that came out of the gem - the trap*
Aang: You just HAD to touch the gem, didn't you?