...some spots on the Main Trail between Trailside Meadow and Trail Camp...
I believe SaltyDog is referring to that section of the trail (while going up) near or as you cross the last "stream crossing." If there is any snow or ice on this section it is a "expeditious way" down to TSM.
If you suffer from vertigo, yes, you can "freeze up."
For me, this section wasn't bad going up, but it was the coming down, especially with compacted snow and ice on the trail, that made me mumble some expletives and say, "I wish I brought my YakTrax."