A 23-yeаr оld mаle wаs skatebоarding dоwn a ramp when he flipped over and landed on his head. He is clenching his jaw and you are unable to insert an oral airway. He thrashes his head when you attempt to provide bag-mask ventilations. His oxygen saturation is decreasing, and his ETCO2 is increasing. What is the best option to secure his airway and provide effective ventilations?