When in a cardiovert situation, forget to sync your monitor.
-Forgetting to secure your oxygen bottle to your stretcher.
-Forget to flush your IV line before you run it into your Patient.
-fart in your Patients face and make him die of muster gas poisoning.
-Don't verify your intubation...
Before my Basic testing, I got stressed, I think I was more stressed waiting the 6 weeks after the testing to find out whether or not I passed or not. Just keep calm, keep study sessions short (20 min - 40 min) then take a quick 5-10 min break. Get with your class mates and take a study group.