Two examples from my past one in a Jet the other in a twin.
Jet was enroute to Nice and we were given severe turbulence between FL 200 AND FL280 which makes a mockery of those who think you are out of danger high
I warned the passengers but not a ripple all the way down into Nice which was embarassing for me and the warning to the PAX.
We flew back empty on the more northerly SID out of Nice. passing 22000 feet all hell let loose with 45 deg wing drops, cupboards flying open. Luckely the jet was slow in the climb as she was almost uncontrollable.
I asked for an immediate climb to FL340 and at the level we were at in the Citation expected a rate of about 1000 fpm we were going up at 3000 fpm
and held that all the way through FL300 into smooth air.
The second was in a twin flying UK to Malaga at FL120. I was single pilot and picking my way between two storm cells near Madrid with ground temperatures at 45 degrees.
In clear air between the cells the ASI went in a flash from 155 kts IAS to 70 kts IAS. I punched out the autopilot went for full power forward on the column and NOTHING.
Same attitude same IAS. Nothing I did made any difference and the
aircraft felt as it had flown into a vacuum!!! I had never experienced anything like this before sitting there with over 2000 fpm on the VSI going down like a lift.
At FL090 after dropping 3000 feet the controls came alive. I informed ATC and climbed back to FL120 as if nothing had happened.
So BEWARE
Pace
nb have reported both of these here before