Corrected entry: When Piper freezes an object it always continues with its path when it unfreezes, but when she unfreezes the knife Rick has thrown at her it drops to the floor. (00:36:20)
Corrected entry: When Nathan and Rick throw the knife and stab Leo after Leo pulls the knife out he heals himself, However throughout the whole series Leo makes it clear that Whitelighters can't heal themselves.
Correction: It's been noted throughout the series that the only way to kill a whitelighter is with the poison from a darklighter's arrow. Leo can't heal himself when injured from a darklighter, but can heal himself from other wounds.
Wait that still doesn't make sense. In the episode where Piper and Phoebe find out about Paige's existence, Leo gets injured and Phoebe asks him why he cannot heal himself and he responds "3 years together and you are just now asking these questions?" Piper is icing his neck for him. That was another wound (not from a darklighter) and he was not able to heal himself then. I think the writers just needed an easy way to show the ghost brothers that Leo was still alive and that he is a whitelighter that cannot die.
Corrected entry: Leo has always stipulated that he cannot heal himself, but when he gets stabbed by Rick his wound instantly heals itself.
Corrected entry: In the episode Saving Private Leo, Leo can't heal the dead but yet he manages to heal Piper even though she died.
Correction: She didn't die. Her spirit was still there, close to her body. As they explain it all the time, you die when you move on. When you're a ghost, you haven't moved on yet.
Correction: This is a power advancement.