A scene is like a... well... a scene from a movie. 

Example: I want you to draw Fred the dog and Rambo the elephant doing a battle scene in fire and it is nighttime.

The final product is in this image

If you are a "Furry" you will already probably know this. If not, a fursuit is a term for a costume that is an anthropomorphic animal. Parts of it being, claws, fur, fangs, tails, spikes, tusks, etc.

Comission example: I want blue paws with black paw pads and black claws. Four fingers, kinda dark blue, and can fit most hand sizes

The final product is in this image

Inside a mystery blind bag there may be, treats, drawings, stickers, toys, fursuit parts, clay figures, and maybe even some weird random gag gift.

Comission example: I want a mystery bag, I will send you some OCs and stuff I like! Things I like are Five Nights at Freddy's, Wolves, Painting, Dog toys, and I'll also send some of my OCs to you if you wanna make stickers or something.

The final product is in this image