Avengers: Endgame featured a reference to Hot Tub Time Machine... 1 / 8
... which Winter Soldier actor Sebastian Stan starred in as Blaine. 2 / 8
If that movie exists in the MCU and Stan starred in it, does it create a paradox? 3 / 8
Stan was asked about the paradox during a recent convention appearance... 4 / 8
... saying the two meeting would be a nightmare. 5 / 8
Stan also seemed amused by the idea and said he loved the reference. 6 / 8
He also reiterated how much he enjoyed working on Hot Tub Time Machine. 7 / 8
Avengers: Endgame is in theaters now. 8 / 8