Hey I was wondering if Bloo's 'Bear Arm' technique was a reference to Goku's 'Dragon Fist' technique (from Dragon Ball Z) because the way it was initiated, it looked very similar to Dragon Fist.
Here is a video of Goku's Dragon Fist
The Dragon Fist technique was at 00:44 seconds into the video.
I'mm sure all of you know how Bloo's Bear Arm looked, and if you didn't you probably know how to download the episode on the site.