Twister model rocket launch with a B6-4.
Not sure what happened. It was built to spec and had plenty of time to dry. It was supposed to go up straight and then use tumble recovery (twisting) but it spun around in the air directly after launch. The ejection charge blew right when it hit the ground.
One fin broke loose when it crashed but it will be repaired.
Update: I've read that the Twister rocket is unbalanced with B rockets and above, even though the package recommends up to a C. Only launch this with A rockets or lower.