Oh man. Having a go at this Holiday Hoarder Level. Managed to collect all the junk (thanks to the guides posted above, never would have figured it out otherwise). waited for the two dudes to meet up at the fountain, shot the propellant tank, it didnt blow up and they ran off. Brilliant. Tried it again, got all the stuff, waiting for the dudes, thought id take my time to line up the shot perfectly, they stand in place for about 1 second then walk off before i took the shot. Brilliant.