Dragonball Comedy
Description
This stage of Super Saiyan is a go between for Super Saiyan level 1 and Super Saiyan level 2. Goku said that he had found a way to surpass the power of a Super Saiyan. Vegeta and Trunks were the first saiyans yo reach this level after training in the Hyperbolic time chamber. The Ultra Super Saiyan form increases a Saiynas power 3 times. However, the downside to this is that the saiyan becomes slower thus making this form practically useless. In apperance, an Ultra Super Saiyan looks pretty much the same as Super Saiyan level 1 but with bigger muscles.

The Alternative Theory
What can you say about Ultra Super Saiyans? Basically, this transformation turns them into rippling, oiled up homosexuals. Their main power lies in their unbelievebale homosexuality. The other thing is that this is the starting point for Saiyans becoming Nazi's this is further explained in the Super Saiyan Level 2 description