Originally Posted by Loren Pechtel

Even if they normally stamp not everplace always does. We once got into and out of Singapore without a stamp.

On the way in we were delayed on the plane a bit (probably hunting down a stray object but I don't recall) and by the time we got to passport control they were chatting with each other, saw our US passports and simply waved us through.

We left via train, the idiot taxi driver took us to the cable car station instead of the train station and we got there at the last instant. Passport control waved several of us through--the train was already rolling but slow enough that we got on anyway.