reports just this weekend. including tornados and softball sized hail. in northwest iowa, it was flooding. nearly 10 inches of rain destroying 1,500 businesses and homes. a colossal tornado in north kansas. this is what it looked like inside. storm chasers brandon ivy and sean casey deliberately drove into the tornado. >> i wasn't standing up in the turret manning my camera, you know, i just left it running i was pancaked on the ground. >> reporter: using casey's tank-like vehicle called the tiv. this isn't the first time inside a tornado. they film with an imax camera and the tank that they ride in is made for this. see the spikes on the side. they use them to dig in. the vehicle can then be lowered. so when wind goes up and over like the opposite of an airplane wing it forces it to stay down. tornados are one of nature's great mysteries. and with video like this -- we can get valuable information