I could not help but notice the seat choice pattern:
First person takes a seat not directly across from me but a little to the left.
Next person sits to the left of me about three seats down.
So on and so forth....
It is as if they were filling the gaps. Choosing places that would still keep one out of their "personal" zone.
When all of those "personal" spots are taken, then comes hesitation and deep thought. "hmmmmmm, do I want to sit over there?....ahh...no...shoot?....okk." HAHA!
Each person had a certain expression when making the choice.
Super quick reaction status with a bit of a jolt.