The method is called "the burp".
Reduce the exhaust and intake - and quickly raise the lid only an inch - and close it again.
Repeat a few times until the fire is stabilized.
If you want to extinguish completely - close off all vents fully.
Custom Klose Backyard Chef... of Snot, and a 22.5 WSM
Lang 84 Deluxe kitchen, Lang 60 Mobile - The Damsel II, Lang 48 Patio - The Damsel, Bubba Keg Grill - RIP, Double Barrel Smoker and a BSKD