Within X-Men universe have there been cases where an individual unintentionally died because of technicalities of their powers?
Example 1:
Mutant X can fly, but X doesn't know he can only fly in total 1 hour per day (suppose between 00:00 day 1 and 00:00 day 2). Eventually, X flies really high, after 1 hour his power disappears (as he's used used up his power for that day), X plummets down and dies.
Example 2:
Mutant Y can shoot water balls that explode. When Y is near a water source (suppose near means within a fixed radius), that source is used to create the water balls. At some point, Y uses his powers not within a water source and his body explodes as Y did not know that some liquid was required to feed his power.
Note: mutants that eventually figure out the technicalities or side-effects of their powers through usage do not count.


