He absolutely did not do that, lol. We saw him fall down into the mouth. We didn't see him die. It's a pretty noteworthy detail that the Sarlacc "slowly digests you for a thousand years."
Falling in doesn't kill you. Given how strapped he is with weapons, armor, and a (busted) jetpack, it's not at all unfeasible that he managed to make a narrow escape one way or another.
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I write Naruto Fanfiction. But I am definitely not a furry.