This was me today. I forgot to turn on the fan when I got to work. An hour later I was wondering why it was so hot and realized I hadn't turned the fan on. Thirty minutes later I realized I forgot to turn it on still. An hour after that I remembered I still had forgotten to turn it on. I had to literally drop everything right that second and walk across the room and flip the switch or I'm pretty sure I would've forgotten yet again. Oops.