Lossie, early 90s. Old and bold ex-Bucc pilot converting to the GR1, on one of his first flights over an unusually calm bit of the North Sea. Pilot takes GR1 ever lower and ever faster. Faster and lower. After a few minutes at very low level, the GR1 nav is sweating a fair bit. Later, back at Lossie, Nav says
"I've never been so scared, what were you doing?"
"Oh, you know the Bucc could fly in ground effect at 20 ft or so above the sea - well I was trying to find the same thing on the GR1".
"And?"
"The Tornado doesn't have it".