Thanks for the comments.
Ref. #1, the grass photo, it was one of those moments... I was just packing up and going back to the car, when I noticed the sun coming over the coastal dunes and highlighting the dew on the stalks. I used the ZM C Sonnar 50, I really like this lens for the transition between what is sharp and the progressing diffusion towards the background.
Ref. #2, I sat on the cliff for several minutes, just playing with the timing of the waves pounding the rocks. I also tried some long exposures, but in the end, I liked this one better, it has more energy.