Clark County sheriff’s Deputy Rob Ternus was standing in front of his hijacked patrol car, parked alongside Northeast 78th Street, shouting for the suspect inside to surrender.The man didn’t. Instead, he locked eyes with the deputy, changed gears and accelerated straight toward him.“That’s when I knew I had a bigger problem,” Ternus testified Tuesday.At that point, the five-year deputy said he decided to use force.He jumped to the sidewalk and fired one shot through the window of the patrol car as it whizzed past. Ternus was the first witness in the trial in Clark County Superior Court of Raymond H. Hall, 30, charged with first-degree assault of the deputy. During several hours of testimony, Ternus was candid and detailed about what happened the early morning of Dec. 26, when he pulled over a pickup on Northeast 78th Street for having defective brake lights.Ternus asked Hall, a passenger in the pickup, to step out and talk with him. He said Hall ran away, circling the block while ignoring the deputy’s repeated commands to surrender, and then jumped into the deputy’s patrol car and sped away.“Can you explain to jurors your concern?” about Hall being in the patrol car, Senior Deputy Prosecutor Alan Harvey asked.“My concern was my rifle,” Ternus said.Ternus said that Hall could have gotten the deputy’s rifle from the patrol car. “If I get into a gunfight with a rifle, I’m in a losing battle,” the deputy said.