DUTCHMAN HURT BY EXPLODING JOINT ROTTERDAM, June 14 (Reuter) - A Dutchman seeking a mind-blowing drugs trip is in hospital after a joint exploded in his face. "We have never heard of anything like this before," said a police spokesman on Tuesday, adding that the 55-year-old man had just lit the cannabis joint when it blew up. The victim is being treated for burns in a Rotterdam hospital. There was no immediate explanation for the incident. Drugs are legal in the Netherlands and joints are sold in varying sizes in cafes and other outlets. Transmitted: 94-06-14 10:18:22 EDT