I actually have had one of those in my mouth before unfortunately. I didnt know thats what it was.

I was barbecuing at a cabin in Shenandoah and it flew into my Mikes Hard Lemonade without me noticing. When I took a swig I had what felt like a large piece of wet carpet in my mouth, and then that fuckin thing was the result. Thankfully, he was extremely intoxicated from his swim and could hardly move let alone sting my mouth out of self defense or anything. I ended up mercy killing it on the assumption that being submerged in alcohol for a while had messed him up pretty badly