Not so far fetched Byrna et al,
The time and place shall remain undisclosed but we powered back off stand (actually a set of steps on the fwd door) and as we taxied to the runway the captains brief was "what ever happens we take off"
. A/C type B757-200 RB211-535E4
I would only add that if one intends to go regardless, then one wouldn't mess about with a derate. Full power will get you up to speed faster and give more runway if anything untoward should occur.
Edited to protect the guilty