Some more fun TV evamples - Good ol' Joss Whedon:
"Once More with Feeling" - Heh, I don't see that happening at an RPG table anytime soon

Unless you got the best bard players in the world...
"Hush" - NO talking. Just find other ways to communicate. Happens inside Silence spells all the time, but one could extend the effect to last an entire session and get some interesting pantomime going on.
"Halloween" - Gang is transformed into their costumes - not just physically, but mentally as well.
Angel's "Smile Time" - the vamp is turned into a muppet. Laughed my behind clean off. Couldn't sit for a week waiting for it to grow back.
Could actually poach the idea for a game: have the characters transform into - or have their spirits transferred to - constructs. No law says they have to be medium-sized humanoid constructs... "Whaddya mean I'm a 5 inch long animated clockwork turtle'?"
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On another note:
I played in a game where the DM provided our normal characters with an 'oracular vision': To effect this, for one session we 'became' our enemies, set an ambush and attacked and killed our normal characters. Brutally. That group all typically plays neutral good and chaotic good sorts - all noble and heroic. For this session we were all flavors of evil. I was disturbed by just how 'into it' the players got.
("Hey DM? We don't NEED this village for anything later do we?" "Er, I guess not." "Right, we sacrifice the town. All of them. Then we animate as many zombies as we can as footsoldiers." "Er, what?" "We worship dark deities, right? Says so right here on the character sheet you gave us...")
Yah. Anyway,The ambush plan we developed was then used by the DM against our regular characters - but of course, forearmed with the particulars, our party was victorious and averted the mass sacrifice. Nobly and heroically (whew - back to normal!)
Interesting way to experience some radically different character types. Plus it was interesting to fight the 'same' battle twice from divergent perspectives. Also allowed us to effectively fight enemies that would normally have kicked our butts.
A'Mal