Why is an abandoned tennis lying ball dangerous? If you notice one, don't ever let your pet or child approach it! And don't pick it up yourself either! Instead, call the police or ask for help.

An innocent-looking ball can turn out to be a homemade explosive that can seriously injure you or your dog. In most cases, tennis ball bombs and other homemade explosives are found before, during, or right after the fireworks season. People pull the insides of fireworks out and put these explosive materials into common objects: ping-pong balls, pipes, and tennis balls. After that, they add a wick. Some such fireworks are set off effectively: their creators launch them into the air, and they explode. At first sight, it may seem cool. But, in fact, it's downright reckless. 

Learn more about your ad choices. Visit megaphone.fm/adchoices