Blue Beetle and Superboy in “Unfinished Business”

How are the ears?

Fine! Oh, ugh, fine. But what were you thinking using sonics against an Appellaxian?

Dude. Never even heard of an Apple-laxative before tonight...

You freshman never do the homework. Haven't you read the case file on the League's first mission? Haven't you taken the guided tour of the Hall?

Those are rhetorical questions, right?

The Appellaxians were an alien race of energy beings that attacked Earth twelve years ago. They inhabited elemental host bodies, including one made of crystal that could ABSORB AND REDIRECT A SONIC ATTACK!

Oh. So, what were they doing inside the Hall?

The original seven members of the League drove the energy beings off-world. The empty husks the aliens left behind became the League's first trophies.