Sometimes I just think about what was going through Joker’s mind when he decided to go into those chemicals again (assuming this IS the second time)…. 

Would it kill him? Would his worsen him more than he already is? Going back into the same place that changed him forever. I would think there would have been at least a tiny bit of negative emotions to be facing that again. Had he even been there since the first time?

Facing something so daunting, yet he jumped anyway.

For Harley….