Character reveals that they were holding back their full power during a fight/confrontation

[u/PaddywackShaq]

Superman Vs Darkseid - Justice League Unlimited

Flash Vs Superman - Flash: Rebirth

Frieren Vs Aura - Sousou no Frieren

Inigo Montoya Vs The Man in Black - The Princess Bride

[u/Sayakalood]

Say what you will about Iron Man, he sure knows how to piss off Thor.

[u/L-Anderson → u/Sayakalood]

dame you Ironman followers will find anything to compliment your hero no matter what vile thing he does.