In the end we were asked to speed up and increase rate of descent at the same time. We had full speed brake out at the time so he increased power. I pointed out this fact and was told "sonney, speed brakes are for going down and throttles are for going faster".
'struth! There's always one! No, actually there's a lot more than that
Had aged skip who, when minor error pointed out by FO or FE, would rotate erect thumb and say "Just testing, old boy." He WAS being intentionally amusing.