Heard this while eavesdropping on Vilnius APP some time last year.
Scenario: Formation of 2 F-16s in radar trail inbound Vilnius for a practice approach, passing FL200-ish.
Vilnius approach: "MA01 flight, expedite decendt to alt. 4000ft"
A/C: "Wilco, MA01"
50-ish seconds later......
A/C: "MA01 4000ft maintaining"
Solved the first conflict beautifully, but they did plummet past another a/c!
Never use it unless you know what to expect!
Made a dreary day as liason in Siauliai tower a bit more fun
