As the narrator says:
'Denki Kaminari: Electrification! When he goes over his wattage limit his brain short circuits and he becomes a huge idiot for a while!"
Denki has got to be one of the funniest MHA characters XD
If you don't get this meme, I'd recommend searching it up on YouTube. If you can't be bothered, long story short, he uses his power too much and goes over his limit, he becomes a stupid individual and a huge idiot. It's hilarious when you watch the clip 🤣