[Swordmaker]

It’s likely that the (closer to the mouth) coils used were titanium. It can be done but is not recommended. Titanium can cause a class delta fire when heated too much or too quickly.

Possible, but still not going to cause an explosion with enough force to break the mandible AND they are still a couple of inches away from the lips in most e-cigs and usually enclosed in a brass tube.

[RandallFlagg]

If he was dry-hitting on a titanium RDA (Rebuildable Drip Atomizer), the titanium would be less than an inch from his mouth. Those RDAs are really small.