The first shot was the closest but by far was the most difficult and it did not require a wild miss. His target was in the extreme right of the limo and only had to miss a foot or two to the right to miss the limo.
More like three or four feet:

but even a foot at 100 feet is a huge miss. If he actually tried a shot that early and missed he would have incorrectly estimated the lead. So one would expect the bullet to hit too far ahead or too far behind. In that case he missed by 15 feet.