I had previously heard of this, and it came up again at Miramar. If you are somehow playing your second shot from the teeing area, you are allowed to tee it up with no penalty. This surprised me, so I looked it up.
Per Rule #6.2, if you are playing from the teeing area, then you are allowed to tee it up. The teeing area is defined as two club-lengths back from the markers, and within the markers. Regardless of how you got there (penalty stroke, rebound off a tree, etc), you're allowed to tee it up. This is the rule that allows you to re-tee after a drive out-of-bounds (or into a penalty area). It also would apply if your tee shot hit a tree, and bounced back to your feet. You can play your second shot from a tee. And you can play it from anywhere within the teeing area.
So it is legit, but it seems very unlikely. I usually tee my ball up at the front of the teeing area, so unless it goes backwards (and backwards by only two club lengths), you're playing it as it lies.