Nokia

A brick weighs approximately 3 pounds.  I would say thats enough weight to hold you down.  Especially if youre walking around with a brick in your pocket.

I would like to draw a parralel from bricks to phones.

These "bricks" we all carry around have great power.  I find it odd and disturbing how dependant we are on them.  Like real bricks, they can either be used constrcutively, or destructively.  Instead of "breaking a window", "build a house" with your brick.  Be careful how you use your brick, and tighten that belt on those pants you are wearing.  You wouldnt want that heavy thing in your pocket to make your pants fall down.