DM: Okay, Malachite uses her power to grapple you and...succeeds.
Steven: Hmm... how can I solve this problem with a charisma roll?
<thinking>
Steven: I got it.
DM: Please no.
Steven: I run to the cave full of watermelons and convince them to fight the monster.
DM: That's going to be a pretty massive penalty, since it's several times their size and can clearly kill them in one hit.
Steven: *rolls* Let's see, that's a... 35.
DM: ...they attack the monster.

DM: Okay, so you and Peridot are almost to the center of the Earth.
Steven: I try and talk to it.
DM: You try. And talk. To the abomination. The non-sentient abomination. Which doesn't have ears.
Steven: I use my telepathy powers.
DM: ...okay, you're talking to it. It's not thinking coherently.
Steven: I roll to convince it to not form.
DM: Holy shit what the hell you lucksack.
<pause>
DM: But it can't really be convinced to not form; it's not under its conscious control.
Steven: I roll to convince it to bubble itself.
DM: HOLY SHIT WHAT THE HELL YOU LUCKSACK
Steven: It's a natural 2, what are you talking about.