Hamsters are relatively small rodents, standing just over 40 ft. and weighing 4-5 metric tons. For the earliest stages of development, hamsters reside in human households as pets. Around 2 to 5 years later, the hamster instinctively plays possum, and is flushed down the toilet upon being presumed dead. At this point, the hamster begins to assimilate raw sewage through its newly-developed gills, allowing it to grow to gargantuan proportions. Shortly afterwards, the hamster begins its menstral cycle, and runs about rampant through densely-populate cities, terrorizing (and consuming) everything in its sight. They are also wonderful singers. Hmmm, sounds like women.