[@KatherinWinter]
Well for living beings like animals it's mostly just important events in their lives or moments they explicitly remember. From the comic I ripped it from, it usually just means the moment before they died or if he licked some fresh blood from a fight he'll get visions of the fight that caused the bleeding and probably a few seconds after that depending on how strong the emotions were of the event and the freshness of the blood. My character doesn't like eating meat too much because of that. Nonliving objects it depends really, most don't give him visions but things that had strong emotions tied to them like say a shell casing that was used to shoot somebody would show him visions of the shooting though how clear the vision depends on how long the event happened. Books and Anything with written knowledge would give him enough information as basically somebody who skimmed it and got the gist of what was there but no specifics though that method would obviously ruin the book. The more I think about it the grosser it sounds but meh, I really wanted an interesting power and this was probably the least stupidly abusable one of my list of weird powers. I hope I don't sound like I'm trying to downplay it cause I know I might sound like I'm going "I could just do x and be super powerful". If it still sounds too powerful I'll just change it to something more generic like being able to turn into gas without much control where it goes or bone manipulation but most things made hurt like hell and need a lot of calcium to use.