hum...... DAZE> thats if time was linear.going back in time, may take u 2 a point that was from another time line differnt 2 ours.whos 2 say that by going forward or back in time would we b going in our time. PABU> well for starters, when traving in a car at high accleation, u fell a slight puss on u as the car goes faster.times that by the speed of light, and u get a very big squeeze. some people belive that light is the fastest speed, and experimence that have tryed 2 move an object faster than this have been unsusful, (electrions). hope that answers ur questions. by the way this is just my thoughts, don't take these as true facts, have a look 4 urselfs.