This run is something I don't understand. I tried experimenting with Diaz and eventually got this time, but I cannot for the life of me say what precisely killed him: gang members' grenades, my actual explosives, the car detonating, the car splattering, no solid idea.

Killing Diaz doesn't even feel remotely consistent, but because of that I believe that there's a high likelihood of the absurd ~6s 1st place time on the in-game leaderboards being true just because it might be a fluke shot as soon as you see the slits of the garage door and the car explodes and runs him down. That never worked for me, but who knows? Grind 1,000 hours and you could be the new Diaz quick kill C:

(Xbox 360 disc played on Xbox One S)