Star Wars Bloopers for Star Wars Day

In honor of Star Wars Day ("May the Fourth be with you!"), here are miscellaneous mishaps and oddities from all six films.
Episodes IV, V, VI
My favorite part: around 3:15, an AT-AT catches fire, revealing its true scale.
Episode I
R2-D2 has serious stability problems. Bonus: His lines, Yoda messes up.
Episode II
Anakin face-planting, falling down during a lightsaber battle, and spitting out overly hot soup.
Episode III
There was "Nooooooooooo!" official blooper reel for Episode III, so some YouTube person cut together behind-the-scenes footage of wacky stuff. My favorite? C-3PO falling down unintentionally, and Samuel L. Jackson falling down intentionally.
If Star Trek is more your thing, check out my collection of Star Trek bloopers.