The line comes from My Hero Academia, where All Might tells Izuku Midoriya to eat a strand of his hair so the One For All quirk can be transferred. The scene became one of the series most quoted early moments because the heroic setup clashes with the strange instruction. Clips of the short delivery later spread through anime edits, reaction videos and soundboards, where it is reused out of context for any forced handover, unwanted gift or dramatic reveal that needs an instantly recognisable anime punchline.