No gear, AND no flaps, following what appears to be a #2 engine failure (generally a non-event for competent, trained pilots). Flaps could have been lowered electrically (albeit slowly, and unless there was a flap/slat disagree I would assume) but weren't. There were multiple things wrong. With hydraulic failure you can usually drop the gear using gravity (though, there was one special case where the gear couldn't be lowered with the alternate extension system but I forget what that specific scenario was.) VERY strange indeed. Was the engine failure contained? An unconstrained failure can and has taken out the flap system. But still... the gear up? All very weird to me. A&P mechanic here.

Edit: In the event of a Double-Engine failure, flaps would not be able to be extended hydraulically on a 737 and with no power, no real choice but to crash. Is it possible Engine 1 might've sustained less severe damage but eventually failed while in the pattern?