The cubes won't hurt you when they explode, but using that type of mechanic offensively could be fun.In Stealthlands we experimented with placing a bomb then shooting it to detonate it. I don't seem to have any screenshots of the bomb, but I do have one mid-explosion:You could even sneak up behind an enemy and attach a bomb to them, then when they walked over to their friends shoot the bomb blowing them all up.