I was Pax (and the only blue job) on a VC10 Kai Tak to Brunei, only about 30 Pax, PF did a spectacular departure, even for a 10. Spoke to the loadie about it and he reckoned they (the pilots) had decided to show the brown jobs on board just what a sportscar the 10 was, I know that even at 37 years distance it still sticks in the brain box.

VC10 at Gan, tail overhanging the end of the runway. Pilot applies full power with feet on the brakes. A blood-curdling moan from the engines as they bite the air when the brakes are released and the aircraft hurtles down the runway and takes off at an alarming angle of ascent. My ex-wife and my children still remember this amazing experience from 1972!! Did the same flight in 1975 but without the amazing display of power. A lovely aircraft, I was so sad to see it decommissioned.

On the 777 a Full power Take off is called after an engine change. The engine already has been test bed run and all parameters are recorded. After installation , Dry and Wet motor runs and idles are completed with checks of the Hydraulics and Electricals along with Anti-Ice. Pneumatics are checked at approx 80% N1 ( GE90) These checks are all completed by the Engineers .
The full power take off can be quite a handful when there are ATC height constraints !
First flight after engine change is naturally a ETOPS Verification flight.