Pkaby: yeah i go up 'backwards' with the bug. so use the rear tires to bounce up the stairs. this way it is usually easier for ppl to help you as well. my bit of advice is to make sure that you use the middle doors. although the bug fits through the front and rear it is a tight turn once you get to the top. whereas with the middle it is easier to just reverse until you get to the opposite door and then you can just stay there mostly out of the way of other commuters.

HTH!