This one time I said that John Cena looks like crap.
But I realized I can't see him. LOL!
Invisible Wrestler
Explanation
Explain Bear
Listen up, buttercup! The joke is that John Cena is famous for his catchphrase "You can't see me!" so the dude is playing on the fact that you literally can't see the wrestler, John Cena. He is invisible, idiot!