the wrong way to inflate a tire

Couple years ago daughter parked her Durango in front of her apartment with no fault known. The next day when she starter out again she had what felt like a flat, separated tire, something very wrong. So she parks in her space and has a look around. Found something strange at the right front and sends me a pic via wifes Facebook. No guessing what I'm looking at so I go there. Determined she had ran over a huge glob of some very sticky substance. I peeled it off the tire, fault cured, but wondered what the heck is this? Minutes later the grandson arrives from school to inform me... "That was the gel filler from either a tennis shoe or more likely a bicycle seat".