Peter ran, unusual enough in itself. What he should have done was contact the others. They always knew what to do, and were generally better at crisis management than he was. Peter was given to panic, and was on the verge of it right now. When he looked around, unsure of where to go, he spotted a trail of blood; never before had he been so happy to have Elizabeth bleeding.
He ran into the alley and saw a shadowy figure lying on the ground, and another shadowy figure behind her with what he was fairly certain was called a gun. For once, Peter didn't hesitate, instead pointing his wand at the gunman and shouting the first offensive spell that came to mind: "Incendio!"
The figure's clothes caught fire, and rather than stopping, dropping, and rolling like a sensible person, he ran. Peter pocketed his wand and knelt beside Beth. She was still breathing. He placed his hand over where he was confident the wound was. "Beth..."