That should of been enough time to adjust. Next time you could try taking out some of the old water from the cup, and adding in a little from the tank every 10 mins to get him adjusted better. Only needs 30-40 mins. Water temp only, 15-30 mins is good as well. So may be from him not quite used to warmer water and being in the cup for an hour. He should be fine though within a day if that is all it was.
thats funny. well if you just sorta tap the tank at the top every time u walk by and put 1 little peice of food in every now and then he think "when he walks by i get food" so he'll come up to the top or w/e. it may also have sumn to do with your floor. you may walk to heavily and it sends a wave through their home... sooo they hide! lol.