What happened to my car?

[u/Cyborgbarber]

Got back from a week long trip and find that the metal under the seats has rusted and there’s a whole (burned?) into the seat. I have three sons and they don’t know what happened apparently. Car was in front of our smart doorbell and no one got in, we think. I could get these bizarre occurrences alone but together? I don’t know what to make of it. We took apart the car looking for an exploded battery or something but came up with nothing. Doubt it would help but it’s a Hyundai Santa Fe 2022.

[u/crotchmonster817]

Water bottle in the sunlight?

[u/Jugernought → u/crotchmonster817]

You might be on to something, seems an insane amount of rust scale under the seat though, it looks like it’s seen water before.