I work at a target and we have a freezer which is kept at -20 degrees. If one could sneak in and spend maybe an hour or so in there
Been in one of those freezers before, hurts just to be in it for 5 seconds. You have entered it, right? Surely you should know how bad an idea this is.
That said, target has all sorts of cameras up. I know they usually don't give a fuck, but there's no way you would be able to get away with that. In the case that you survive, they will probably fire you for it. Corporations are unempathetic and don't care how mentally ill you are unless there's a chance you can ruin their image by literally dying in their store. You'll end up worse than where you started.
Edit: okay so if it's the freezer I think you are talking about, that has direct vision to the outside of one of the aisles. PEOPLE WILL BE ABLE TO SEE YOU. Forget management finding you on the cameras, you will literally be freezing to death in view of customers. This is a bad idea doomed to fail.