[Zavien Doombringer]

I agree, it wasn't the foam slowing down, it was the craft speeding up! The lack of thrust on the foams/ice part causes it to look like is slowed. Had the velocity remained constant, the foam would look like it was "floating".

[Moonman62]

I agree, it wasn't the foam slowing down, it was the craft speeding up! The lack of thrust on the foams/ice part causes it to look like is slowed. Had the velocity remained constant, the foam would look like it was "floating".

Consider this: there is still atmosphere where this happened, and the air isn't moving along at the speed of the shuttle or the foam. Therefore, the foam would start to slow down rapidly because of wind resistance, while the shuttle was still accelerating.