Reincarnated Misfortune (3.5e Flaw)
From D&D Wiki
Things in this life remind you of things from your last, and these things make you sad.
Effect: From time to time, the character sees something that reminds him of his former lives. At the start of every encounter, there is a 25% chance that he notices something that causes him to recall his past. If this happens, he takes no action for 1 round and thereafter is shaken until the encounter is resolved.