After entering the command /summon Boat ~ ~3 ~ {Riding:{id: Fireball, ExplosionPower: 0, direction: [1.0, 0.0, 0.0]}} I at first got something that sort of worked. However, after changing the one to a five the boat would be summoned, there would be an explosion, and a boat would drop as an item. However, a boat would also stay, levitating in the air that was unmovable by pushing, and would only occasionally be moved by a piston. It was possible to walk on it, but other than that it didn't really interact with anything. Also after doing this I was unable to access command blocks in the world I was using, but could after reloading. Also, the glitch seemed to disappear after reloading. Not really sure what happened. Sorry, if this makes no sense, I don't have much experience with error reports.