hm.... Lars time travel episode... where he gets transported into his old body... and has to pretend to be his old self because absolutely no one will believe "yeah I'm from the future but sent to the past in my own body"... once again confronted with his past self's own behavior... having to pretend to be someone he isn't anymore and specifically someone he hates... truly seeing the effects his old behavior had on his friends and family but not being able to change it because that would only make everything worse... having to act mean to them because that's what he would have done...
dare I go even further and say he would try to overcompensate too? self hatred really distorts the past, he tends to think of himself as having been worse than he actually was, near evil really. so he acts meaner than he would have, figuring he'd do stuff like yell at a stranger for no reason when in reality the most he'd do was roll his eyes. so everyone's like "dude what the hell is going on, why are you being so mean today? you're not usually like this." and he's like huh?... i'm not?... but i... but wasn't... didn't i... but everyone hated...
and. and the having his old skintone and hair . but in like the worst scenario for it. .. having to go back to the pink after everything's over hahaha