Pretty surprised to see him insta-fold. A hand like QQ probably takes this line, but at least thinks about calling.
He was probably bluffing, which I obviously didn't expect because he checked the flop.

Wondering how you guys approach these things?
I think one of my top 3 leaks is that I give plays like this way too much credit. I usually think ''well, he would have bluffed the flop because it's so dry, so he's probably never bluffing, and the sizing looks like he wants me to call''.

So I most likely overfold in these spots. But when I do call down to find out what they are doing, they almost always have it.

Please give me your thoughts about this subject.
Really hoping Sauce comments in this thread, because he's the guy whom I've seen do these kinds of things most.
c/c'ing SDs with initiative, c/c'ing OOP with air to bluff later etc.
Is this the same concept as discussed here? http://www.runitonce.com/nlhe/how-to-play-the-turn/