I recognise those poses Sonic and Tails are doing. They're from the Sonic Generations cutscene when you've defeated the Egg Dragoon. At the very end of this cutscene when Classic Tails says 2This is getting stranger all the time." Modern Sonic and Modern Tails form theses poses!
Impressive. If only Sega could see how easy it would be to just take Sonic, lock the camera behind him, and make a good 3D Sonic game, with local 4 player Co-op, online Co-op, time trials, simple head-to-head versus modes, a good storyline, well thought out 3D worlds, then we'd really have a true, good Sonic Adventure 3. But I hear Generations isn't bad interim.