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For real. Christmas trees real trees when dried out. Are fire accelerators.
As a dude that used to burn my tree after Christmas. Those things are dangerous when dried out. Keep that bitch moist af

He accidentally set it on fire with a lighter.

Uh, no, that's not how it works.

He may have unintentionally and accidentally killed himself when he failed to realize the fire he intentionally started would get out of control.

This is why you train your kids and expose them to guns, fire, etc. Gets the curiosity out of them and they don't decide to just play with it.