Giggy, you made me think of my dead buddy Redskin. We were working on a large crew, and there was a couple of guys that really pushed the limits on goofing off. They did the bare minimum work, left early for lunch, and were always the last to come back.
I see him grinning like a jackass eating briars at lunch time. He tells me to pay attention when the goof offs came back from lunch. They came wandering in ten minutes late, grabbed their screw guns, and when they pulled the triggers, POOF! Instant smurf. He'd taken a bottle of blue chalk for a chalk line and filled up the veins in the cooling fans connected to the armature. I seriously hurt myself laughing so hard.