And I assume that was SS that kinda pulled Bernie back from her and hustled her off.

Those secret service guys (I too am guessing that's who they were) did look concerned. Sanders sort of jumped to help her and they got between them rather quickly.

Next he stops mid-speech to rush to the aid of a collapsed audience member.

Now a supporter behind him faints onto him?

A sign from the almighty? Bernie is here to rescue us?

Seriously, hope the young woman is ok. Warning to all people attending any events: if you stand too still for too long yes, you may faint.

It happened to me once in a wedding service. Bridemaid standing next to me fainted into my arms. To make it more dramatic, she was probably twice my size and, gulp, we were all holding lit candles

I caught her in one arm and her candle with mine in my other hand. My mother noticed her starting to sway and reached us immediately after I caught her.

Standing on risers and locking your knees is a recipe for disaster.

If you feel like you are getting faint, start doing mathematical problems in your head. It works (almost) every time.

Glad she is okay.