24. Darren Cross Kills A Guy...And Flushes Him Down The Toilet
Darren Cross' insanity is proved early on in the movie when, as he's talking to a colleague in the bathroom, he tests out a special shrink-gun he's engineered, attempting to harness the Pym Particle in order to create his own version of Ant-Man, the Yellowjacket. Rather than shrink the man, however, his crude test fails, and the poor guy is turned into a pile of red, bloody goop. Cross then scoops up the victim's remains in a tissue and flushes him down the toilet, in what is easily one of the grossest moments in any Marvel movie to date.