Another thing was explaining to the trainee that Lightning mainwheel tyres operated at 360 psi, and lasted on averge 5 or 6 landings, hence they never did touch and go's, either go arounds or full stop landings. You had to learn to expect the unexpected too; the pilot might call 'downwind land', then on short final say 'round again'. If you misheard and said 'say again' it would be too late, as following the 'round again' call there would be a sudden increase in noise level as the afterburners ignited and he climbed away!