A few things that I've done on Isotropic:
- Drawing a $6 hand near the end of the game, playing all my treasures, and buying a Farmland, intending to trash the Gold (that I had already played) into a Province, not realizing I had to leave something in my hand. Could have bought a Duchy...
- Playing an Envoy (or any other terminal draw) and then frantically clicking on a +action card I drew, reloading the page, checking the trackpad, and only then realizing that I have no actions left
- Playing a Remake when I only have one card in my hand that I want to trash
- Hitting the "play all treasures" button, forgetting to play my Contraband first. I did this two or three times in a row before I finally started playing Contraband first.
- The first time I played with Hamlet, I was discarding cards every time I played it. Then I realized I didn't have to.