Frank the Welder

 The yellow bumper, and dual sideways reservoirs, 2Nd one housing the air pressure valve like the ttx tells me it's ohlins, along with the unashamedly rough looking welded prototype look, not something any pretentious mtb only brand would push out to the public eye, only a company that cares wholly about development. Ohlins playing with some sort of on the fly adjustment there too

 could be anyone... based on the eyelet location in the front it seems to be metric, as is would be to close to the shock body if there was a classic eyelet. the colour of the shock bumper might be a hint. sram and fox would be black i guess. anyway...i go with sr suntour as it is embarrassing for a sponsor that their athletes are running shocks from competitors.

 Cannondale?

 Marzocchi?

 Suntour

 @davetrumpore ..aaahhhhh !!!!! all this guessing is driving me crazy !!!!

 Its a prototype with parts from other shocks. The biggest reservoir is from a DHX5, I am almost sure ....

 RST!

 homemade by the guy's mechanic

 Push?

 CaneCreek .

 Push is my first guess. Ohlins second.

 Elka?

 X-fusion ?

 Avalanche, maybe...:-P

 Storia?

 CC

 suntour or formular