Used to work on car tires and had a newbie mount one up and air it close to 100psi before it exploded, knocked him about five feet backward and gave him a concussion and hearing loss. Lucky honestly. They can be small bombs.

Had another in the Fleet service (Who are provided air up cages) but never use them. Air a ring rim (Simular to bead lock) up and the ring popped off, Grazed his forehead and went over a hundred feet in the air. Also very lucky to get by with stitches and concussion. The Cages were made manditory and a automatic firing if not used after that.

They make cages, But a line with the gage far from the stem is adiquate and standing back and not over the rim. As mentioned. If they aren't seating by 20-30pds, Break em back down and lube both the rim and the bead.

Yeah, I've heard of stretching tires But at what rate are you trying to do it? Anything over 40psi can be deadly and if they pop under that. Its still going to sting do some damage, Think Firecracker you didn't get rid of quick enough. Up there around 100psi is like a stick of dynamite. You want to stretch em, 30ish and direct sunlight will work better than more air pressure.

Tragic loss. RIP and prayers to the Hull family and friends. I do not know the details. The above is just personal experiences.