The wall of pain (often abbreviated as "WOP") is a Jigglypuff edgeguarding technique. Taking advantage of Jigglypuff's amazing aerial game, it involves barraging the opponent with fast, horizontal aerial attacks to carry them off the stage. This can be done because of Jigglypuff's great aerial mobility, combined with her aerials, which have low knockback but enough hitstun to lock enemies down for a KO.