Yes I would. If I were conscious I'd watch what they were doing if possible.
As for "jumpers in at work" or however it was you phrased it... don't be so sure.
At a chemical processing plant a co-worker in an adjacent department had an accident and was drenched with caustic chemicals. A friend and I ran over and stripped his clothes off and got waters hoses and kept water on him until EMT arrived. We had no clue if what we were doing was right but it was the only thing we could do and with his skin pealing off and him screaming we felt like we had to do something because nobody else was doing anything for him and it made the heat and pain a bit more bearable for him. It turned out to be the only thing that could have helped since we had nothing to neutralize the caustic.
Point is... sometimes people do something because something needs to be done and nobody else is doing anything.
What do tattoos have to do with this?