boburhedRAGTOP

Thanks to the both of you for taking the time to answer! Makes a lot more sense!

I feel relatively smarter now

I know I'm dumb, but can someone explain this part?

"Dana sees each rock at the same time, but Bert sees one rock and then sees the next rock."

How would anyone's movement, or lack of it, affect their perception of whether the rocks landed at the same time or not?