He stuck his knee out on Fisch and caused him to miss almost the entire 2003 season. And then Fisch had a terrible 2004 season when he was still trying to recover from the ACL tear, it may as well not even count.
No, all I remember is Fischer TKO'ing Hartnell.
Hartnell was also a big fan of running Detroit goalies in his time with the Predators, I remember him ramming somebody (Leagace, I think) and injuring him for a time too.
And those are just against the Wings, he's left his mark on other teams, but probably don't get as much notice because unlike, say, Pronger, who is well known for his dirty play, Hartnell has never done anything notable hockey-wise in his career to warrant any attention.