AKA, exactly what I said?

Including the things I pointed out to do and three factors to consider.
Though yes, it could work if it was a matter of him just being stressed or so on. First, I know he just ate because he was hungry and nothing more because I asked in my long list of trying to make sense of the scene. I asked a lot of questions. Also, if someone would do that well and play into it, you'd want to have the stress-eater trait already established. If not, then you'd want to draw attention to it in the scene by having someone else react to it, likely with someone having a reaction to it, and continuing to play stuff. It just happened in the most bizarre way (WHO CARRIES AROUND BURGERS IN THEIR POCKETS?!), and there being literally nothing else to it is part of why it was so dumb.
To not, the entire story was that level of incoherence. That moment just jumped out to me because a hamburger just materialized out of nowhere and was such a weird whiplash for me.