To be fair, Gwyneth Paltrow is not at fault for this scene's cheese element; her character isn't even seen on screen. Brad Pitt's acting isn't necessarily bad, but there's something about it that has made "what's in the box?!" the punchline of many jokes.
Sofia Coppola hasn't received rave reviews for her portrayal of Mary Corleone in The Godfather Part III. The dichotomy between the acting chops of Al Pacino, Diane Keaton, and Sofia Coppola is very apparent in MAry's death scene.
Even the best performers make mistakes; Marion Cotillard had recently given birth when filming The Dark Knight Rises and does a stellar job. The uncharacteristic cheesy death (too many exhales?) is made even more noticeable within the context of an otherwise great performance.
Arguably the worst death scene in the worst movie ever made. Tommy Wiseau actually lies back before the gun is even fired; it's no wonder this film has a cult following for being hilariously bad.
Boba Fett is a well-recognized name in the Star Wars universe. The character deserved a dignified send-off, what he got was a whimsical plummet into a Sarlacc pit (courtesy of lackluster jab from Han Solo).
"Not the Bees!"
William Dafoe was a great Green Goblin...up until an abrupt, inconsistent, and corny death scene. "Don't tell Harry," then immediately drops and dies.