Back in 1974 or 75 (can't remember which) I was with Air Training Corps at RAF Laarbruch in the Summer Hols, this is when Jaguars were still stationed there.
We were scheduled to do some flying one day (I'm 95% certain it was in Chipmunks but may have been in Bulldogs). Anyway tower warns my instructor that there's an active exercise going on as well so be very aware of other traffic.
We roll down a grass strip and within 30 seconds of taking off some US Fastjet comes screaming across the airfield and passes about 200 yds in front of us with little or no vertical separation.
Twr : Fastjet1 (in a very very agitated voice), Lar Twr - The next time you do that across my airfield without appropriate clearances I'll get them to stick a Bloodhound up your pipe.