Don't eat too many sunflower seeds

I took care of a 35 yr old father this week who was sitting around watching a football game drinking a few beers and eating sunflower seeds, just enjoying himself. Comes to ER the next day with his abdomen all distended and hard and in a lot of pain. He ate almost 2 bags with the shells on. The seeds had solidified into a hard mass in his lower intestine. After trying to dig it out etc he had to go to the OR and ended up with a colostomy since the surgeon had to remove part of his lower colon since the mass o seeds had turned into the consistency of cement. Very sad.