And then they decided to do the lowest, slowest flyby possible using the alpha floor (aoa limiting) protection system to supply TOGA power at the last possible second. Their mistake was to be ignorant of the fact that alpha floor is inhibited below 30 radio. By the time they realised something was amiss and pushed the thrust levers forward it was way too late, the CFM56 (like any large jet engine) takes time to spool up.
Doesn't sound like safe decision making. Can't blame the a/c.
LD