The 'pingas' gag comes from the Latin American Spanish dub of Adventures of Sonic the Hedgehog, where Dr. Robotnik's line 'Snooping as usual, I see?' was heard as the Spanish slang word 'pingas.' That mishearing became a running joke in YouTube Poop edits through the late 2000s and kept spreading across gaming meme pages. 'I can't feel my legs' is its own long-running action-movie cliche, and mashing the two together created a punchline that works in any clip where someone gets dramatically knocked down.