This is what happens when a chihuahua finds a spool of thread that has dropped on the floor. She tugs on the top of the spool creating a lovely flower effect, she never eats any thread just makes a mess of it.
This is what happens when you have a son with the mind of an engineer.
This has happened a few times before. I usually end up unwinding half the spool into the trash, because the thread no longer comes off the spool properly on the sewing machine.