So anyway I set a cake into the oven and put the internet timer (here) on for 20 minutes. Except I had another timer open on another page that already finished. So half-way through I saw the timer flashing 00:00 and thought ok that was a bit early and went to check the cake. It was wet in the middle and I thought nah that's not done, "needs 12 more minutes."

Then I went back to the window to check why it flashed to zero and realised I had opened the wrong window and when I went back to the timer it said 12 more minutes left and I was like DAMN I'M GOOD.