First, a disclaimer: This is a trick I learned from two different sources, a TV show talking about how a couple of Landcruisers travelled across Antartica, and from a local tire shop. It involves combustable materials and fire. If you cannot do stuff like that safely, don't do it at all. Things can catch fire, including you. If you do it, keep a fire extinguisher nearby. As a matter of fact, this is something that shouldn't be done by anyone anywhere at any time.

Ok, here is how I've beatded up the 36 inch tires on my truck. I've had a couple that didn't seal properly, and if they got flat, they would unseat from the bead. All that is needed is either a can of ehter (starting fluid) or possibly even gasoline, a match, and some compressed air. You might be getting an idea where this is going...

I've done this with the wheel unmounted, and done it with the wheel bolted to the truck. Squirt the ether on the rim, trying to keep it inside the tire as best as possible. Seat the rim on one side. Now, stand back, light a match, and throw it at the rim. What will result is a pleasing fireball, expansion of the gases inside the tire (due to the heat of the flame front -- similar to the pressure that builds inside an internal combustion engine), and the tire will usually seat. Often, there will be some residual flames on the side of the tire, but those will go out quickly. Put the air chuck on the tire now, and fill the tire up to the desired pressure, making sure the bead is fully seated. On my tires, there isn't enough pressure to keep the beads seated, so it's important to get the compressed air into it quickly.

Again, this dangerous act shouldn't be done by anyone where at any time to avoid singed hair or exploding cars. But I suppose I could see applications if I'm running low pressure in the tires when four wheeling; if a bead came off while I'm deep in the woods, this is the method I'll use ot get back on the road.