If you have coins (or other thin items) that get placed on the dash shelf in front of the glove box that happen to slide under the glove box door and become irretrievable, don't try to use a paper clip, shop vac, wire, tape, or other item to get these items out of that area.
Save yourself some grief and just remove the two hinges on the glove box door with a flat headed screwdriver (completely remove one at a time), take the glove box door off, and then retrieve the lost items.
Not that I spent a lot of time trying to fish coins out with a paperclip and a flashlight...