Most common reason would be due to a split within the tyre structure which gives a 'exploding' effect due to when the rubber of the compound reaches breaking point, it splits very fast. So actually, they don't explode but just split very fast. Cause of the split can be due to tyre compound failure like at silverstone going couple years back or a collision of a front wing of a car onto another car's tyre.
At the Pirelli Factory
The rubber on the tires keeps the electricity from hitting you
No it would not because electricity does not effect rubber. Tires are rubber.
Every part of the car exposed to the air-stream except the tires
chemistry is related to tyres because if you put to much pressure in them they will explode
So it won't run out of air or explode while driving
Water is way too heavy to put in tires, plus in the winter it will settle and freeze so your tires will be off balance. Also about the winter part, if you completely filled your tires with water and let the water freeze, the tires would explode, since water expands when it freezes.
Not just Minnesota, ALL country/state driving laws make it illegal to drive on unsafe tires. Bald tires are unsafe because they have poor contact with the road, and are more likely to blow out (explode).
Down force and how well your tires and engine are performing... i met a man in a Ferrari Enzo and asked him about formula 1..
Race cars use tires with no grooves (or 'Slicks') as they provide the most surface area contact with the road which provides the most grip. More grip = more stability. The slicks are only used when the track is dry enough as they will not clear away water, they are more likely to lose contact with the track and hydroplane/aquaplane, which will cause a loss of grip. In Formula 1 when the track becomes too wet for slicks they will change tires to either Intermediate or Wet tires which feature different depth grooves for driving on a wet track. A road car cannot use slick tires as it must be suitable for driving in any condition at any given time, plus all 4 tires of a Formula 1 race car can be changed in a little more than 2 seconds, I doubt you'd be able to manage that with a road legal vehicle.