Just a Midnight Snack
In this peculiar scenario, it's safe to assume that the person in question was likely engaging in some sort of unique challenge or dare. Their choice of snack leaves no doubt that this isn't a typical midnight indulgence, as they are seen consuming a raw onion slathered in mustard.
The unconventional combination questions the motivation behind such an unusual culinary experience. The expression on their face, contorted in discomfort or dissatisfaction, suggests that this particular snack may not be an enjoyable culinary adventure. Whether it was a self-imposed challenge or part of an amusing dare, we can only hope that the individual found some form of satisfaction, entertainment, or perhaps a reward for participating in this unappetizing feast.