Underwater Jackhammer ... and how to BLOW THINGS UP underwater

OK, so what we have here is the underwater jackhammer. They love this thing, because it sounds like a machine gun underwater. The way this works is you up this up ... that’s how you get the bit in and out ... close that up. If you have to dig a hole, you can put the spade attachment on it. You can also use it to drill holes in the side of dams, even inside rocks to plant explosive charges. Hammering inside the bedrock, planting the explosives inside, getting outta there and pushing the trigger, watching