What does Sergio remember that he and Gideon did when the man was hurt on the subway?

Sergio remembers that when the man was hurt, Gideon bent to help him. He took Sergio's t-shirt to try to stop the man's head from bleeding. Then he gave Sergio his phone to call 911. Sergio had to go up to the street level to call. Gideon and Sergio helped the paramedics when they came, and the man was taken to the hospital.