In what circumstances will a defendant be arrested at gunpoint by police officers?

In United States v. Greene, 783 F.2d 1364, 1367-68 (9th Cir.), cert. denied, 476 U.S. 1185 (1986), we held that the officers did not convert a stop into an arrest by ordering the defendants from their car at gunpoint because an informant had seen a pistol in one of the defendants' motel room. In United States v. Taylor, 716 F.2d 701, 707-09 (9th Cir.1983), the officers ordered the defendants from the car at gunpoint, and handcuffed one while making him lie face down in a ditch. We held that this did not convert the stop into an arrest, because the officers had been informed that the defendants were dangerous, and there were two suspects and only two or three officers on the scene.