lol first time I've seen you wrong Ian
Assuming kilcin hasn't misquoted the LRB
Ok, if you fumble a TTM, it's a turnover. Because it's treated just like a pass action except for the things mentioned in page 23, second paragraph, left side.
Similarly a thrower fumbling the ball is not a turnover if a player from the moving team catches it.
Any Fumbled Pass, Fumbled Throw Team-Mate Pass, Eating your team-mate, Thrown players with the ball failing the landing, Being ejected for a foul, etc.