I don't know if anyone outside of the people directly involved know anything other than what eyewitnesses have said. One citizen said she heard a " boom" but it is impossible to know if that was pre or post contact. I did see an early statement that perhaps due to a lowered lake level a bucket snag might have occurred but I'd guess anyone flying a bucket would be cautious to catch that before a bad outcome. From things I read it was not possible to know if it happened on the inbound or outbound segment of the dip. Don't know if it was a long line or belly hook suspension. Just glad there were no injuries.