Of course the skiff gets hit again by the "rail" gun. That skiff is almost entirely a railing.

Transcript

[SFX]: Kaboom!
GM: An explosion rocks the skiff. Roll for balance.
Han: 4. Uh oh.
{Han falls off the skiff, Chewie grabs Han's feet, Lando falls off the rope}
R2-D2: So much for you protecting Lando, Luke.
GM: Actually, he's clinging precariously to the sandy slope above the maw.
Sarlacc: Come to me, puny morsel. I will taste your mind...
Han: Dig into the sand with your feet!
[SFX]: scrabble scrabble {Lando kicks, sand falls in Sarlacc's mouth}
Sarlacc: I... don't like sand.
Sarlacc: It's coarse and rough and irritating, and it gets everywhere. I want to eat something soft and smooth.
Lando: Gaaahh...
Sarlacc: Like you.