"my first impression is that the 7000 fpm climb is not necessarily pilot induced but instead it is a 7000 fpm updraft in a CB .
Which in turn will strongly reduce IAS and increase AOA : hence the stall ."'
Joe2
This has been dealt with before. A rising air current (updraft) does not necessarily reduce IAS. It actually adds energy to the aircraft. Gliders do not automatically stall in a thermal just because they go up. The problem is the attitude it may induce, which may be at such a rate that the automatics cannot deal with it and IAS reduces.
People are thinking, but you are not reading before posting.