The first kill was by motorbike, a dude running desperately toward the circle and I was driving the motorbike. Tough luck.
The second kill was blind dude just run before me thinking it's safe. He even tried to cover behind the three. Completely revealing himself to me. UMP-9 does the job.
The third and forth kills were some camper noobs thinking he was safe on prone. Wrong.
Then, only three players left and the #2 kill the #3. I knew #2 location. he is behind the rock.