Where is the danger of a battery explosion?

[unable to retrieve full-text content]

ohm = Volt\Amp
Volt=Amp*ohm
Amp = Volt\ohm
Watt = Volt*Amp

I've been counting this Ohm's law over and over again and I wonder, what situation makes a battery getting dangerous?
Which results of the calculation gets the battery stressed, or in human language, "may explode".

A battery is sitting in a mech mod at 4.2V with a coil in a tank tank measuring 0.25ohm.
That gives

4.2/0.25=16.8
4.2*16.8=70.56
16.8Amps and 70.56Watts

OK, no rocket science here.

Since the situation is running at...

Where is the danger of a battery explosion?

Where is the danger of a battery explosion?