Sam sees Steve getting pinned down and sees a unit of the armored agents heading his way. He quickly changes his flight path (wishing the warehouse had more room to maneuver) but gets pinned himself as he is forced to dodge more mini grenades. He also sees the front doors getting swarmed with HYDRA agents as well.

"Hold on, Cap. I'm trying to get to you. I'm afraid our entry is compromised."

Distracted, he missed one grenade that is arcing towards him.