"Looks fun!"

Then might I suggest looking up the POETV banger about Delta P. Might make it seem substantially less so. XD

Nope, couldn't pay me enough. Look at how tight that guys is in that tube. He has to be an expert diver (he's alone, no buddy, good god), he has to weld underwater, he's near a breach in the main that could lead to pressure differential (as Jeriko-1 refers to above), and there is some sort of slurry being pumped into the tube?

Do you have all your stuff? d’oh!