1. Photo-realistic paintings of underwater scenes http://5thin.gs/qKSn92

2. Is this over-the-top hotwheels set up real? Click through to vote if you think it's real or not. http://5thin.gs/p5u77g

3. Six famous thought experiments, each animated for 60 seconds of explanation http://5thin.gs/nNjXUR

4. Astounding helicopter skiing filming and photography http://5thin.gs/rm3luA

5. One scene from the movie Brazil http://5thin.gs/nShTUO