The ICs have a destructive way of collapsing, than the brain that acts as an analog system which can compensate.
As for the thermal effects you need a lot of energy to warm up the tissue because it's full of water (that means it has a high caloric capacity).
The only thing to consider as dangerous are the long-term effects...
P.S. Long time ago, someone with a walkie-talkie turned off my portable radio-cassette player on the beach (just as if it drained the batteries' power) !!!
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Ferrari wiki
