Slade hated Gotham. Not only because of Batman, well he also contributed to the hatred but not only because of him. The city was a cesspool. Fortunately, he was only here in transit and was about to leave, but decided to stay for a few more hours. The reason? You. The random street kid who was caught stealing Batman's stuff. He forgets about Robin. He needed you. So he put you in the trunk after he knocked you out. But after four hours he didn't hear any particular noise so he finally stopped. I really hope that brat didn't die on me...he mumbles as he gets out and opens the trunk