Whatever position it was stuck in probably resulted in a lot of stress.

You or the next guy, there's likely no way to avoid an explosion. However OP, while this wasn't a FU, your lack of PPE certainly was, and you're lucky not to be in the ER with a shard embedded in your foot

If you have tools out, then safety goggles and shoes are the bare minimum imo. Don't be the guy who lets his overconfidence get in the way of the fact that accidents can and will happen to everyone