Yes, that was the next problem because of large amount of actors and multiple shoots from the same place, it would look bad with lots of skidmarks there... The take had to be restarted everytime to erase te skidmarks.

What to say, everything looks so great and realistic that it's really hard to find drawbacks
:
, etc, etc...




But those sound effects etc. were really good. 

i wouldnt know
But as was stated before, skid marks were disabled since the tracks were covered in them which wouldn't look good for takes. And I don't really understand your other point to be honest.
do you know why the guy was chasing him/her?