If a rock is hollow, then it is not a meteorite

All the photos below were all sent to me by persons who inquired if the rock was a meteorite. None of them are meteorites because meteorites are not hollow. Many appear to be some type of concretion.

This rock was found in the Atacama Desert of Chile. More than 3000 meteorites have been found in the Atacama Desert but this is not one of them. I think it is a volcanic bomb. The nearby Andes Mountains consist mainly of volcanic rocks. Meteorites are not hollow and they are not this reddish. Some of the rocks in the mosaics above may also be volcanic bombs.