When you aren't wearing a condom, but need to pull out, and the bitch you're banging doesn't want you to jizz on her, you grab her shoe and dump your cum load in it. Afterwards, when she walks around, the moisture will cause her shoe to squeak, kind of like a squeaky pedal on a bike.
Kelly didn't want me to drop my goo on her chest last night, so I popped my shot right in her right sneaker and gave her the squeaky pedal. You should have heard that bitch walking around, sounded like an old bike. Guess that will teach her to take it on the tits.