I've got a stupid question

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I seriously am very afraid of not doing the lengthening correctly.

First of all my english sucks so, I cannot express my feelings as well as I want.
But you know,

Consider that I had the surgery with Stryde method.
What If I mess with the buttons of the External Remote Controller and accidentally lengthen my leg like +1cm in a SECOND?

Or what If i use the External Remote Controller and think that I actually lengthened, but In reality It didn't do anything at all? I mean, we can't see our bones, nobody here has an X-ray sight.


Please answer me!

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Thanks for the reply,

What about External Fixators?
What If you just spin the things too fast? ( idk what they are called )