Actors often have a hard time maintaining their composure while filming death scenes, and DVD extras are full of BTS footage of actors cracking up after trying to keep it together until they've finished filming the scene.
Which is why many of the clips on a blooper reel feature actors cracking up while trying to be super serious during a death scene, as they counteract the sadness by acting super silly.
This blooper compilation from Looper features some super funny clips from Inglourious Basterds, Dracula: Dead and Loving It, The Avengers, Jaws, Guardians of the Galaxy Vol. 2, Merlin and The Interview.
-Via Laughing Squid