You know which cliffhangers are the biggest assholes? The ones that leave room for interpretation. The ones that make you think of so many questions that there could not possibly be enough answers for. The ones that make you lose your shit.
Case in point: I feel like the last sentence of Catching Fire is the equivalent of a stranger handing you a briefcase, murmuring "the penguin flies at midnight", and walking away. Because then you're left standing there like, what the fuck?? What do you mean? What the hell is in this briefcase? What am I supposed to do about it? What penguin? And how can it fly? It's a flightless bird, douchebag. And midnight, today? Or midnight, tomorrow? And how the hell does a penguin know how to tell time, anyway. And what does it have to do with me? Where is it flying from? Where is it flying to? Why is it travelling? What kind of sick shit is this? BECAUSE PENGUINS CAN'T FLY, ASSHOLE.
See? Makes you lose your shit.
P.S. To be fair, I guess, LOST had some of the most fucked up cliffhangers of all time, eventually clarified them all, and I STILL didn't have a fucking clue what was going on most of the time.