Scene: An eskimo and an explorer walk into a room.
The explorer lays down a map on the table.

Exp: So, we're going so traverse the ice cliffs *here* to reach the docking station *there*.
Esk: CAN'T DO THAT.
Exp: Why?
Esk: TOO MUCH PENGUIN.
Exp: Ok, then we'll try the ice cave route on the right.
Esk: CAN'T DO THAT.
Exp: Ugh, why not?
Esk: TOO MUCH BEAR.
Exp: Fine! I give up! We'll just sail straight on an I'll improvise once we reach the ice!
Esk: CAN'T DO THAT.
Exp: WHYYYYYY?
Esk: GOT TO BE INUIT TO WING IT.

Not so much a real sketch as a real lame joke that popped in my head.