I must express some concern. clandestino, that you do not consider
"The pitch attitude changes from
6° nose-down to 13° nose-up in
11 seconds then stabilises at
about 11° nose-up"
to be a rapid change in attitude, nor a pitch attitude peaking at 18 degrees to be 'extreme'?
Both in a heavy jet at high level.
I do. To me that is anything but 'benign'.