Hmmm, well I already mentioned my opinion on the Pirate specials on the PM I sent earlier (that poor piggy), but... To further elaborate:
I loved when they buried Tory in the sand and he was struggling to get out! I also liked the "walk or run in the rain" experiment, the exploding toilet, and the "driving in reverse in snow" one. But I believe my favorite episodes were anything to do with animals, like cockroaches surviving a nuclear Holocaust and the duck quack echo. Ooooo! Ooooo! And the ninja special!!! Watching the attempts to walk on water was awesome!!