In one of Andrews comments he says,

Explosions
@ACEPILOT109 @SupremeDorian When you click on a part you get a popup that has an EXPLODE button. It was intended just for us for development and testing, but I think we're going to leave it in because it's too much fun. The size of the explosions are now based on what the part is and not necessarily how hard they hit the ground. Fuel tanks with RP-1 and monopropellant blow up nicely. Xenon gas is actually inert.....ie BORING!

So we can and will make suicidal rockets intended for lighting up our skies.

BIGGER THE ROCKET, BIGGER THE BOOM