Garth Brooks performed a fire drill during his concert Friday in Chicago ... only problem ... he was nowhere near any flames.
Brooks came out of retirement as a touring headliner this weekend ... and the 52-year-old singer miserably failed when he attempted to jump in the air during one of his songs.
The country legend managed to avoid rolling off the stage -- but he was inches away -- and his ten gallon hat still fell into the pit.
Friends in really low places.
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