The turret cooked off, presumably killing the commander and gunner. The escaping crew member is very likely the driver who sits in a separate compartment in the tank chassis.
This should illustrate: https://en.m.wikipedia.org/wiki/File:T72B3-Crew.svg
Unit "OCHI" and the 66th Mechanized Brigade torched a Russian tank. (streamable.com)
t.me/noel_reports/3434