In history, true stories of these unnatural occurrences are well documented. For those unfamiliar with the graphic detail of real tornado video, I will say the special effects in Twister do a pretty good job of showing the tornado's rapid circulation. Whirling dirt and debris are depicted using dark brown and black colors, getting the maelstrom's look essentially correct. But these effects are quickly forgotten once the viewers see how unbelievably polite the tornadoes are. The twisters thrust toward the unsuspecting chasers then suddenly hesitate while the teams fumble into position before the assault continues.
Tornadoes wait for no one.
The growling and snarling sounds coming from the spinning vortices are also overdone. Real tornado chasers have often claimed large tornadoes do roar. But, the freight train rumble described by tornado survivors is a typical description for a reason. Never has a fierce tornado been described as feeding time in the lion's den. Twister's real damage was done at the writing table or on the cutting room floor.