Thanks everyone for your input. I'm not exactly a newbie (and am quite familiar with binding the workpiece, and have the piece of wood that kicked back up my arm and into my ches from my table saw hanging on the wall as a reminder), but I have also never attended a miter saw safety seminar. Also, this is what started me thinking about the concept,
http://www.finewoodworking.com/item/11248/safety-manual-miter-saw (see tduram's comment below the piece, but he of course seems to advocate for pull cutting, too). It's hard to imagine a piece binding if it is flat/square and properly secured, but I suppose it could happen, and I'll take that away from this.
What the rather overwhelming/unanimous response led me to do is go and watch youtube videos of people using their miter saws (exciting, I know. I promise I have a life, which is why I was watching those vids at 2:30 a.m.) Kudos to festool for always using either (and not both) the hold down or the hand to secure/move the workpiece. The Festool video features the hold down as a way to secure a sacrificial backing board when using the Kapex, moving the workpiece side to side.
So, I guess the takeaway is 1) use the hold down and hand at the same time only if they are on the same side of the blade/workpiece; 2) don't use two hold downs simultaneously, 3) Festool should add a pneumatic clamp. I joke, but prior to this thread, I didn't even know such a thing existed. . . . I really got a lot of bang for the buck on this one, so thank you all (especially those tolerating not necessarily my lack of experience, but my reluctance to accept something as being so, just because everyone says so).