I wouldn't want to be accused of favouritism so I've animated my SL class too, not that they aren't already animated of course. Unfortunately the gif ended up with a blank preview so you have to open the post to see it. This was inspired by the class we had today on relativity. I condensed the whole of the relativity in to one lesson. It's not because I ran out of time, the class asked if we could do it for fun. At least it was more entertaining than doing another past paper (for me at least).