Well there might certainly be a logic in the comments made, because assuming that the same rules of physics still apply that would indeed be troublesome. However why would one assume that Allah subhana wa ta'ala would still enforce the same laws during that miracle? It's a miracle, and miracles have a tendency to occur under different rules as the normal rules. Furthermore it could be that the earth stops and turns around, but remember all movement is relative. Allah subhana wa ta'ala knows best, and yes it sounds difficult to imagen this will occur, but having faith, I believe it will. Also, the hadeeths are quite explicit about the sun actually rising, so I doubt it's a metaphor.
"The Prophet (sal-Allaahu 'alayhe wa sallam) asked me, 'Do you know
where the sun goes when it sets?' I said, 'I do not know' He said, 'It
travels until it prostrates itself beneath the Throne, and asks for
permission to rise again. But a time will come when it will be told, 'Go
back whence you came.' That will be the time when 'No good will it do to
a person to believe then, if he believed not before, nor earned good (by
performing deeds of righteousness) through his Faith' " [Bukhaaree] [5]
source:
http://www.islambasics.com/index.php?act=download&BID=73
) So all the mountains/trees and everything just freeze. Then He orders the earth to slow down and start spinning in the opposite direction (keeping in mind that the earth itself, molecules and everything are 100% frozen in place), then when the earth reaches its normal speed but in the opposite direction, he unfreezes the earth and tada, direction is reversed, and the sun rises from the west, then everyone who made fun of Islam realises that this is exactly what Prophet Muhammad pbuh said would happen, but TOO LATE FOR THEM.
