Chaos on Friday at work

First there's a bad, bad, bad smell that is coming from somewhere-we think some animal died in our attic.  Then the toilet in one bathroom started gurgling and when flushed, almost spilled over.  When going for the plunger in the other bathroom, I saw Michelle and Jenny hunched over a pool of water pouring out into the conference room and Jenny on the phone with Paul trying to figure out what to do. I guess we flushed them at the same time and it overflowed so Michelle turned off the water valve, Jenny and I got the shop vac while Michelle was moving everything so it didn't get wet.  We plugged it in and the shopvac was already in the "on" position and they screamed because sheetrock dust spewed out all over the place.  I unplugged it quickly; Jenny and I took it out to rinse out with the hose and tried it again.  There is no On/Off switch any longer, it's broken, so we held our breath while we plugged it in again, which it worked! Very well, too, it pulled up the water great!  The bad smell is still there, the toilets got plunged and fixed, so hopefully Monday will be a better day!