A quick round of aerodynamics
(Getting slightly off-topic here)
All fixed-wing aircraft (gliders, powered planes) obtain lift by moving air over their wings. Power aircraft do this using thrust from an engine to move fowards. Gliders do this by converting their potential energy (height) into kinetic energy (speed forwards). In a glider, you are always descending through the air, and the trick is to find air that is going up faster than you're going down.
If a pilot talks of a stall, they mean a wing stall, otherwise they would say "compressor stall" for a turbine engine, and piston engines never stall because they are never heavily loaded at very low RPM (except for prop strikes. Ha.) They would however stop due to other problems, and those are lumped into "engine failures" or something else. Other stalls are elevator and rudder stalls. These are much more rare.
Christopher Emerson is right to say there are different kinds of wing stalls, and I was simplifying in my original post. I have plenty of times practised stalling, of the "mush" variety where you waft through the air, stick fully back, nose still high and losing a lot of height, and also the fully developed stall, where the nose drops as the wings no longer support the aircraft at all, you end up looking straight down at the ground which is rushing up to meet you fast. Ironically, when the nose drops in a full stall, the correct action is to push the nose even further down to get the wings flying again.
And then there are high-speed stalls (tight turns pulling g), incipient spins and full spins (only ONE wing is stalled), and stalls due to wind shear (turning steeply low to the ground). Rudder stalls if you are outside your C of G load limits (flat spins etc) and I have no idea how to recover from an elevator stall!
I also suspect that because a 777 is tuned for high-speed flight (cruise at mach 0.84 iirc) it would develop its low-speed stall fairly quickly. Can anyone see if the 777 has its flaps down? I'm meeting a couple of Lufthansa pilots (one Airbus, one Boeing, both glider) for dinner tomorrow night, I'll see what they say.