"Dog" Chapman was chasing one badass perp last night in Colorado -- so badass, in fact, that the guy was still able to escape Dog's grip after getting into a bad car accident.
Cops say just before midnight last night, Dog was tailing a guy who was wanted for being a no-show for a felony narcotics violation. According to KKTV, the dude's car suddenly crashed, rolling over in the process.
Not to be discouraged, cops say the perp jumped out of the wreckage and took off on foot -- and got away.
Now that's giving 110%.