A local motorist was arrested and charged with DWI after crashing into an 18-wheeler just after 2:30 a.m. Friday. The impact punctured the big rig's gas tank, causing it to explode.It happened on SPID near Staples. Bruce McLaren, a local cab driver, heard multiple explosions and caught footage of the scene."I heard the explosions," McLaren said. "The tires were exploding in the truck.""I saw a big fireball and the truck, the semi, was engulfed in flames," witness Kevin Spain said. "The whole cab was on fire when I got back over here."Investigators said both the drivers of the car and the truck were able to get out before the explosion, and neither were injured. However, police said the driver of the car was intoxicated.