Often times, tetrads attempt to reach "heaven" by assembling themselves into tall, ominous towers. Sometimes, as in the extreme example (left), a Tetris can not even be completed because the straight block is physically unable to pass the obstruction. Thus, the player, fully cognizant of his own stupidity (and/or pride), loses.
For this reason I refer to this situation as a "Tower of Babel", and prevention of one is questionable at the very least. One can only hope that such towers can be controlled; the faster the game gets, the lower the towers must be.
