Judging from the way this amateur goalie's wobbling around, it doesn't seem to be solely due to the ice. The video's apparently from an amateur league game in the Czech Republic. Thankfully, no one will check this goalie into the boards, because he'll probably piss himself.
In case you're wondering how no one scored on the struggle goalie in that short amount of time, there's another video featuring his complete failure at stopping the puck, sitting on his ass in the detached net. He is so messed up.