I taught rocketry after-school classes to elementary school 4th & 5th graders for several years from my junior year of high school through my sophomore year of college. 1987-1991.
I can't recall losing any rockets other than an Estes Skybolt that was flown on a D11-9 in a field WAY too small. The builder of that rocket insisted on flying under "D" power.
Young kids don't like losing rockets, hence most of their builds were flown on an A8-3 or B6-4 depending on their size. Nothing under BT-55 size was flown on anything bigger than an A8-3.

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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC !