Chlorine.

I found leftover chemicals for a pool that’s been gone for 3 years. The directions clearly state: can be safely rinsed down the drain.

Safely?

Just ask my husband and his friend Peter, who now refer to Friday as “the day my wife tried to kill us.”

I began rinsing and pouring said chemical at a very slow rate. Less than 3 cups had poured out of my 2 gallong container, when trouble first appeared.

Series of cataclysmic events as best I remember them:
Clogged drain.
Get pokey thing. Poke said clog.
Drain runs for nanosecond.
Clogged drain. Again.
Eyes watering. Senses blurring.
Get plunger.
Firmly pack all powdered chlorine into pipe.
Eyes watering. Senses blurring. See image of Gandolf in the utility sink.
Asphyxiate anything moving in the laundry room… including Gandolf.
Call for husband and husband’s brave friend.
Bail. Plead for mercy on the court.
Watch He-Men bravely attack drain issue.
Clear path for He-Men to bolt thru garage and suck wind from mother earth.
Taste and smell nothing for nearly 5 hours.
Treat everyone involved to dinner.
Cheat death and live to fight another day.