>>16752013
>>16752016
>>16752019
tnt is actually extremely lackluster energy density when it comes to weight and volume. It's only 4.6MJ/kg, compared to methane's 50MJ/kg. Of course, methane has a shitty MJ/volume due to it's gaseous state and it needs an oxidizer, both are which are not an issue in a rocket with liquid methane packed in close to LOX.

Assuming 1000 tons of liquid methane, that translates to around 50 trillion joules, aka around 12 kilotons of tnt, close to the yield of little boy. Of course, this assumes that the methane combusts perfectly with the oxygen and at the same time, so the any actual blast will be dozens of times lower, but still, it will be a massive boom.