When we took off from Orlando Sanford back to London Gatwick on a European 747-200 (G-BDXF) we had already been delayed for 3 hours due to a massive storm, and when about 30min – 1hr into the flight a flight atendent came around our cabin we were in sunshine first with 22 capacity. When he just went past me we had already been shaking a bit and then we dropped altitude quite a bit and we had our stomaches in our mouths (figure of speach), he was lifted off the floor and hit the ceiling and for about 20 min after that we kept shaking about.
We also landed in a hurricane 😀