Expedite climb.
The PIA t/o I'm referring to was in 30 degC conditions. I assumed it was because of the less dense air and minimal wind conditions that such a tactic was needed (albeit not by other 747's). As I stated earlier you don't have to visit an airport to witness their t/offs. You do occasionally see them some 20 miles from the airport still under full power and very low. It's clearly not right even for a non pilot. They must be overloaded or something. Surely ATC must have observed these t/offs and reported them to somebody?