Jelly legs
Anyone who’s even slightly familiar with the MCU film knows that Thanos is quite the craft villain. After all, he manages to collect all six infinity stones, so there must be something special about this taro-colored evil boss. After everything he’s been through, we’re more than certain that Thanos knows quite a bit about victory and defeat.
In the opening monologue of Avengers: Infinity Way, Thanos lets the audience know that he knows what it’s like to lose. “It’s frightening. It turns the legs to jelly.” In Avengers: Endgame, after realizing he’s been defeated, the first thing he does is sit down.