Polly Chimp Wants A Cracker...In Sign Language!

It’s either that or he’s really wants help escaping!
A chimpanzee finds himself in a hairy situation. There’s a delicious cracker on the ground and he wants it BAD!
But there’s a glass door in the way and he doesn’t English.
Have no fear though, the chimp has a few tricks up his sleeves.
He knows British Sign Language!