Maybe the wing stalled but the pilot said he opened the throttles and at that point the plane should have climed out of it.

Hmmm, that's interesting. You have a link for that?

Yep, cool E-seat. Most US fighters, and some Russian ones, have had "all aspect" ejection seats for 20 years or so. I've heard they can be successfully deployed with the aircraft upside down, at relatively low altitude.

From: Wikipedia

The minimal ejection altitude for ACES II seat in inverted flight is about 140 feet (43 m) above ground level at 150 KIAS. While the Russian counterpart - K-36DM has the minimal ejection altitude from inverted flight of 660 feet (200 m) AGL. When an aircraft is equipped with the Zvezda K-36DM ejection seat and the pilot is wearing the КО-15 protective gear, he is able to eject at airspeeds from 0 to 1,400 kilometres per hour (870 mph) and altitudes of 0 to 25 kilometres (16 mi). The K-36DM ejection seat features drag chutes and a small shield that rises between the pilots legs to deflect air around the pilot.[8]

More than you ever wanted to know about ejection seats