During my time at Cottesmore (1981-85) it happened 3 times. The first was at Coningsby, aircraft B08 flown by an Itallian Pilot with a German Nav. Aircraft G27 was next with an all German crew and Aircraft I40 (which was a jinxed aircraft) was possibly the one your friend saw. I believe it's partly to do with the gear doors providing lift and if the gear is raised too early it can result in ploughing said furrow in runway. We did suggest a mod, fitting 4 castor wheels to the belly but this was met with stony faces!