Proof Rosemary Willis had started looking towards the TSBD by Z-145

[Andrew Mason]

He probably thought it was a motorcycle backfire and ignored it.

Jackie did say that the Harleys had been doing that a lot.

He would not have ignored it after he heard two more and realized they were rifle shots.  That is absurd.  Not a single person said they forgot about the first shot, which Mary Woodward described as a horrible ear shattering noise, after hearing other shots and seeing what was happening. [hint: Zeon was humoring you in suggesting that his camera may have made him go deaf)

[Tom Graves]

He would not have ignored it after he heard two more and realized they were rifle shots.  That is absurd.  Not a single person said they forgot about the first shot, which Mary Woodward described as a horrible ear shattering noise, after hearing other shots and seeing what was happening. [hint: Zeon was humoring you in suggesting that his camera may have made him go deaf)

How can a person forget about something they hadn't noticed five seconds earlier than something they did notice?