europe, including irishman sean branagh. >> at home, unfortunately, we don't get the opportunity very often, at least, to see thunderstorms and such. >> reporter: we met the group in southeastern our lunch break became a lunch rush. >> we've got one storm to our northwest that's going to go severe, probably go tornadic. this is the real deal. >> we already knew it was an explosive day. it was really early, an early show. >> please, nobody out of the van, we're going to gas and go quick. >> reporter: our pair of vans raced for the town of northfield, minnesota. >> look at the rotation. >> northfield's been hit the last couple of years. >> they may be about to get hit again. >> i'm always looking at data, i'm always looking at doppler radar, watching the sky. we get headed north right toward that storm, and as soon as we approached it -- >> look at the rotation! >> tornado on the ground. >> bingo, the first tornado drops. >> tornado, tornado! >> holy crap, it's right there. >> reporter: the storm continues gathering strength, and it's poised to drop even more twisters. >> this is going to be a huge tornado. tornado! >> reporter: we pull over on a dirt road to get a better view.