If u saw a racist attack in front of u would u intervene?

i saw it once. i was in my car while a white man was standing on the corner and a black man was riding his bike very slowly through the crosswalk. out of nowhere the white man jumped towards the black man for no apparent reason, & punched his head so hard the guy fell off his bike & got the wind knocked out of him. i sped into a nearby parking lot & called the police. the beaten man was still in the street as i was driving away. i think in any situation like that, i would just call and keep watching from a distance, recording from my phone. i kinda regret that i drove away, even though i felt scared, i wish i'd stayed to see if the guy turned out okay.