10 Worst Things The Joker Has Ever Done To Harley Quinn
4. He Locked Her In A Rocket
One of Harley's dreams in life is for the Joker to confesses that he really loves her. In one of her earlier appearances, he actually did... unfortunately.
Harley received a note from the Joker that told her to meet him at a rocket ride in an abandoned fairground. When she went inside the ride, all she found was a video screen. The screen came to life and Mistah J appeared to give Harley a special message. He revealed that all their time together and Harley's constant love and affection had opened up his heart to the kinds of emotions he hadn't felt since before he became the Joker.
Unfortunately, those kinds of emotions were distracting and Joker hated feeling them. He pressed a button that locked Harley inside the ride that also turned out to be an actual rocket. Shedding a single tear and saying "I will always treasure our days together, but sadly, inevitably, the time has come for us to part", Joker then launched her into space.
Harley was able to take control of the ship though and crash it into Robinson Park. That was where she met her best friend and eventual lover Poison Ivy.