All I see is strobe lights, blinding me in my hindsight
After he got jumped or whatever might’ve happened, the cops came (strobe lights).
“Blinding me in my hindsight” refers to him not telling the cops anything (being blind). Generally the cops will ask you to recount what happened. Wordplay: — to be “in hindsight”, is understanding an event after it had transpired, so looking back and observing a specific moment.
The lights of the police car are actually blinding him from seeing what happened to him.
To help improve the meaning of these lyrics, visit "Good Kid" by Kendrick Lamar (Ft. Pharrell Williams) Lyrics and leave a comment on the lyrics box