He looked at the target; he looked at Bill, who stood open-mouthed and gasping; then he looked at the muzzle of Mr.Johnson's gun.

His face flushed red, and then became almost black.

Mr.Johnson held the gun easily at his hip, covering both his disarmed companions: Mr.Johnson's eyebrows were flattened and his mouth was twisted.
"It's loaded!" croaked Bill in a horrified voice.

"The skunk only shot once!" Peter corrected him: "Three times.

I fanned the hammer.