I guess as a kid I only had access to the cheap ones? Would pull back, not knowing where to stop, and there was eventually a crunching noise. Then I'd worry I'd ruined the thing!
The "mystery" posed at the end of the OP suggests that that crunching noise was the action of the built-in strain relief within the spring enclosure.
The "mystery" posed at the end of the OP suggests that that crunching noise was the action of the built-in strain relief within the spring enclosure.