If you've seen Toonami promos of characters like Goku, Gohan, or possibly other anime and their characters. Or perhaps seen other Godzilla promos, or fan tributes, then you'll understand.
I'm sure that there has been some fan kaiju mini tributes or promos out there. Why not show your creativity? A mini tribute or promo could last probably two minutes and some seconds. Or you can shorten the time. You can do whatever you want, no ties or rules.
Here's my work and my first fan promo/tribute (Still not good enough yet though)
http://www.youtube.com/watch?v=Kp5OYpHM ... ideo_title