This comedic moment comes from Justice League Unlimited #5. Blue Beetle has been stuck on monitor duty and is really bored. How he decides to pass the time is quite hilarious.

Okay, I'm sorry, but I would NEVER touch Batman's food. Unless, ya know, I had a death wish.

I like the implication that he's already tried on Wonder Woman's costume. Oh Blue Beetle, I'm sure you'd make a fabulous drag queen.