I was cabin crew on a B737 a few years back, as me & my colleagues were all standing down the back counting the bar money we all felt a little turbulence, so I looked out the window to see if we were going through clouds in our descent, and saw grass passing the window.
Yep. We had landed.
I did also hear of a colleague who in late descent had piled into the flight deck with the other crew to check out the view of her house, to save time she hit the button to play the pre-landing PA prior to going in, thinking the cabin would be ready to secure when they came out. Unfortunately on leaving the flight deck the crew looked up and stopped dead in their tracks. The entire cabin were dressed in their lifejackets. She'd hit the ditching PRA code by mistake. Ummmm ACARS for 150 replacement lifejackets please Captain.......