Have you ever seen the Hill Billy way to inflate a tire that just got put on the rim, but the beads of the tire aren't sealed to the rim...?
You take a spray can of ETHER / DIESEL STARTING FLUID, squirt some for a few seconds inside the tire, then squirt a trail of ether on the shop floor back a good distance away from the tire.
Light a match, drop it onto the trail of ether and DUCK BEHIND SOMETHING STRONG.
If everything works right, not only will the tire be perfectly sealed to the rim but it will also be fully inflated.
The guy in this video is more brave than I am.
https://youtu.be/8A_XOWA-DAk