One hand grenade is in the pool, the other is by your chair. Which blast is more dangerous? If you chose to jump in the pool rather than endure the explosion on land, we have some bad news for you: You made a disastrous decision. Assuming the blast from both hand grenades was identical in strength and that you were the same distance from either blast, the underwater explosion, also known as an UNDEX, would be far more dangerous.
Of course, the hand grenade by the side of the pool is no bundle of joy either. All explosives are little more than elements that burn or decompose at an incredible speed. This chemical (or, in some cases, nuclear) reaction produces a massive amount of heat and gas in a very short period. Explosive chemical reactions break down compounds into highly compressed gases, as well as heat resulting from compound molecules being blasted apart. The gases expand rapidly, and the heat speeds up individual