I worked as a bartender my last couple of years of school to pay bills. Had buddies come in and sit at the bar to keep me company when it wasn't crazy.

Have a good buddy who is just an all-around great human being. He'd had his eye on a particular girl for a few months. They'd flirted, made soft plans to hang out, etc. On a relatively slow night, she came in with a couple of her friends to hang out with my buddies.

Enter "guy we don't know very well but always seems to show up". Shows major interest in this girl and pretty much has her cornered. She's too polite to shoot him down in public. Buddy doesn't want to cause a scene. I decided to run interference.

I offered him back to back shots of 151, on the house (from my tips). Slams them down and 20 minutes later is still going strong. I suggest my buddy start ordering them shots. He would get jaeger, watered down to resemble the color of 151, the mark would get more shots of 151...believing all the shots to be 151. He didn't last very much longer. Buddy went home with girl.

I wish I could say that the two of them are married today! The relationship lasted like 6 months. 6 years later, my buddy still whines about her. I wish he'd shut up about it. That's why it's the worst thing I've ever done.