so I have just been wondering the site looking at threads and I couple of things showed up and I didn't know what they were.
1) First off what excalty is a screamin semin? I know it is a grab...I think, but what is it.
Screamin Siemen: Not a grab. Daffy Cross your legs and then uncross. First time I saw one on film was in a Greg Stump Movie. Couldn't figure out which one. One of the US Ski Team Mogul guys, Trace Worthington I think, did a Daffy, crossed his legs, back scratcher with his legs crossed, then uncrossed and landed. This was off "Jump for Joy on the Glacier at Blackcomb. In the film, they called that move a "Screamin Seeman". The actually Daffy, cross your legs and then uncross, Seeman air was named after Chris Seeman, who competed and later coached at Wintepark. There is another guy named Kurt Seaman from Idaho, who claims that he created the trick. As far as I know, it was Chris Seeman. Another variation was daffy, cross legs, twister with legs crossed, uncross. These were the some of the sickest moves that could be "legally" thrown in freestyle moguls at the time.
2) What is a rockered ski?
Rockered is just reverse camber. When you lay the ski on the ground it will curve up like a rocking chair; thus the term Rockered.
3) What are turntable bindings? Does it mean anything different from regular bindings?
On the right are a pair of Marker MRR Rotomats. They were kind of like Porsche's in the day because the design stayed about the same for decades. They are the original turntable bindings.

4) Last but not least, what does it mean when you say steeze? Just really smooth or really good?
Steeze to me represents any tricks done with style.