#22: Breath Holding Not Allowed
We’ve all heard the phrase “Don’t hold your breath,” but this sign is quite literally telling people not to hold their breath when swimming in the pool. These pool rules explicitly state that swimmers should not, under any circumstances, try to hold their breath for an extended period of time.

The anti-breath holding rule is pretty reasonable, considering that the owners of the pool want everyone to be safe while in the water. However, the sign goes on to specify that “competitive and repetitive” breath-holding can be deadly. Sheesh. It’s quite chilling to think that something bad must have happened for this sign to go up. Hopefully, no one was hurt.