I had some hop shots and once thought, meh, this beer isn't very hoppy. I got one out and drizzled some into a glass (what a great idea) and filled the glass with beer, for the most part it didn't help the beer(I was very disappointed), then a small globule came loose from the glass, came into my mouth and stuck to the roof of my mouth. Holy crap, it was all I could do to get a napkin and try to get it out of my mouth, of course my tongue hit it every time it moved, and it seemed like days before the taste finally went away.
Another time, a friend was over and we were using the hop shots, I had added the hop shot to the kettle and was about to toss the syringe into the trash, there was just a tiny bit left on the tip of the syringe, I asked my buddy, "hey do you wanna taste this?", his response was "sure", the look on his face was priceless, lol. I know, it was mean and I shouldn't have done it.
A "Don't do that" lesson for sure.