Lost Count While Mixing Drinks

Last night at work, I was so busy that I started counting down my drinks a bit loose in my head. One of the regulars ordered their usual vodka tonic, and I swear I put in three vodkas instead of one. It’s been gnawing on me all morning, am I imagining things or did that customer walk out with extra kick? I’ve replayed the night over and over but can’t shake this feeling of maybe making someone’s evening more interesting than they wanted it to be.