Tornadoes are a force that we have not yet been able to reckon with. They are fast, hard to predict, destructive, unstoppable by human intervention, and massive.
Our watching a tornado is like an ant watching a human: unknowing of and unconcerned with the ant, the human lays devastation to all in its meandering path. Justifiably, the sight of a tornado stirs up feelings of both awe and fear, with more fear than awe depending on how close the tornado is.
Below is footage of the 5/19/2013 Shawnee and Central Oklahoma Tornadoes, which may be some of the largest tornadoes ever recorded.