Hazmat joke

I have to explain the whole story behind this blip.
Friends of mine moved yesterday, they've been packing their house for several weeks and they're now buried in boxes in their new condo. They sounded a little depressed and a lot tired when I called them, overwhelmed by the amount of work that has still to happen.
I called another friend and we decided to help them, and make them laugh a little. A quick stop by my lab, we dressed up and showed up at their door as the hazmat unit sent to decontaminate their place.
We all had a good laugh, a coffee, and got to work.