Federal immigration agents seeking to detain a Honduran landscaper chased him into a Southern California surgical center and quickly found themselves in a tense standoff as clinic staff demanded to see identification and a warrant. In a video clip of the Tuesday altercation that has spread on social media, Ontario Advanced Surgery Center staff in blue scrubs are heard telling an armed U.S. Immigration and Customs Enforcement agent wearing a mask and bulletproof vest to let go of the man, who is crying and gasping for breath. “Get your hands off of him.