What happened during the Delta Airlines flight crash landing at Toronto Airport?

According to a passenger's eyewitness account, the plane made a super hard landing, then went sideways before skidding on its side and flipping over onto its back. The survivor described seeing a fireball on the left side of the aircraft during the crash sequence. When the plane finally came to rest, the passenger found themselves upside down along with everyone else onboard. Despite the terrifying ordeal, the passenger indicated that 'thankfully everybody was okay,' though they had to evacuate the aircraft as quickly as possible. The description suggests a chaotic emergency situation where passengers had to rapidly escape from an inverted aircraft following the crash landing.