In the episode where Jimmy is kicked out of the science fair, at the near end, the Nobel Prize guy comes and puts a medal on Jimmy's shirt for his "I can't believe it's not oil" machine.

Now after that, Jimmy messes up his machine and saves everyone, but the medal is not his shirt the entire time the evtn happens. That is until the Nobel Prize guy got angry and took off of him. But where was it in the time in between.