Subscribe | UPI Odd Newsletter Subscribe PROVIDENCE, R.I., Feb. 23 (UPI) -- A man who was thrown out of a Rhode Island bathroom by an explosion was able to walk away with only a bruised knee. Jeffery Oppenheim said he was visiting friend Andrew Pessin in Providence on Sunday when an explosion threw him out of the home's bathroom. Advertisement "It happened in an instant like getting hit by a cannon," he told WLNE-TV. Pessin was in the kitchen with his sons, ages 9, 7 and 5, at the time of the blast. "I was in the kitchen with my kids and immediately smelled the burning smell and we just picked them all up and ran out of the house," he said. Pessin said he went back inside the home for the boys' coats and shoes. Oppenheim said he suffered only a bruised knee from the incident. "I'm just very grateful it was me in there and not one of the Pessin children who are little. They could have gotten killed," he said. The cause of the explosion was unclear Monday. Read More Winston Churchill's blood headed for auction At 29, Swedish cat may be world's oldest Canadian lawmaker who left his seat blames tight undies Sperm whale rams fishing boat in Chile