The following incident was relayed to me by a Plumber I know:
I received a call from a homeowner asking for someone to come estimate some repairs. When I asked sort of repairs, he said it would be too many to enumerate, but much easier if I just came out to house and looked. I went.
It began like this............ Old Joe wanted to change his toilet seat, but couldn't get old one off. So he tried wrenches until he rounded off nuts (he was turning them wrong way because they were upside down) and then decided to get his trusty cold chisel and hammer out. Well, he tapped a bit on it with no success, so he drew back hammer to smite a mighty blow against stubborn bolt. In so doing he broke toilet tank and flooded area with cold water. This cold water gave him a shock and he drew back in a hurry dropping hammer into bathtub causing a big chunk of porcelain to pop off tub floor.
Regrouping his thoughts, he ran down to basement two floors below to shut off water to house, house had no other valves installed when it was built in 1890's. Meanwhile water was flooding through floors and had saturated plaster of ceiling below to point it collapsed into living room.
Old Joe then removed what was left of toilet tank, and tried to remove bowl from floor flange. It wouldn't budge either, so out comes trusty chisel and hammer again, and "WHACK" no more toilet bowl. In process however, he managed to tear closet flange from floor as well, and since it was attached to a lead closet bend, it torn and now needed replaced too.