Eye-in-the-sky noun phrase informal
Surveillance above your head or in the sky, such as a camera or a police helicopter
The eye-in-the-sky in the store can prove that I didn't steal your phone.
Eyes-in-the-sky have helped the police a lot in solving cases.
If you take a flyer (on something), you take a chance, risk, or gamble on it.
The coach took a flyer on the young goalkeeper, and it turned out to be a wise choice.