Russian jet pilots know: If you hear him, its too late. If you see him, you're long dead. Now you are no.7
Russion pilot 1: "Hey Anatoli, you hear jet engine exhaust by any chance?"
Russion pilot 2: "Niet Dimitri, you must be crazy! I hear nothing...wait, what is that?"
Russian pilot 1: "Ui Cyk--....
Anatoli and Dimitri in heavan: "Ah yes, now I see: It was Ghost of Kjiv!"