Armed with $500 and access to a studio full of equipment, Federico Alvarez a commercial director from Montevideo ("Uruguay... small country between Argentina and Brasil") created "Ataque de Panico!" (Panic Attack), an amazing robot invasion of Montevideo. And then landed a $30 million contract with Ghost House Pictures. Apparently the trailer was based on this work, also good, but not quite the same level of drama.
(:flash http://www.youtube.com/v/-dadPWhEhVk&hl=en&fs=1&color1=0x006699&color2=0x54abd6 width=425 height=344:)

Now the $500 might be a little mis-leading (pro-bono actors, access to equipment, no charge for post-production time, etc) but still. Awesome.