UFOs

[MetalMilitia]

A balloon may rise and fall depending on air pressure and wind - which is what I understand the word "bob" to mean. You should also appreciate that without a reference point in the sky it becomes impossible to identify the size and scale of movement of an object.

[HickMan]

CALL WILL SMITH! WE'RE ALL DOOMED!

[Jeanette X]

Originally Posted by MetalMilitia

A balloon may rise and fall depending on air pressure and wind - which is what I understand the word "bob" to mean.

Yeah, but it was bobbing up and down constantly, which the wind wouldn't cause it to do. And why a balloon be visible when it was dark out?