[Izkata]

> I don't know about "defying the laws of physics" (since if it could truly defy the laws of the physics that would be whack)

It refers to objects that start and stop moving instantaneously, or make turns at hard right angles, as if they have no inertia.

[gdy]

Very high acceleration and deceleration don't defy laws of physics.

[dx87]

They didn't say very high acceleration, they said instantaneous changes in speed, like the object has no mass.

[Dylan16807]

But the context is visual observation, where there's no way to tell the difference between the two.

[abakker]

ball lightning?