[L]ow blood sugar that occurs after a meal — usually within four hours after eating. This is different from low blood sugar (hypoglycemia) that occurs while fasting. - https://www.mayoclinic.org/diseases-conditions/diabetes/expe...

For me personally, it feels like you're having a panic attack, you get ravenously hungry and eat anything in sight, tremors and heart palpitations, confusion, irritability, dizziness. No fun at all. Thankfully not life threatening though, at least the "normal" kind.

It could be life threatening in the wrong circumstances. For example, one time years ago I was having a bad hypo, and had become very confused - and I was about to get in the car and drive, before my wife stopped me.