On June 6th, 2019, while taking measurements, photos and samples on the surface of Mars, the Curiosity Rover took a series of 21 photos that show some interesting anomalies. These 21 photos were all taken from the same camera position, 13 seconds apart.
Most of the images appear almost identical to the first image:
Image taken at 2019-06-24T08:34:09.000Z
https://mars.nasa.gov/msl-raw-images/proj/msl/redops/ods/surface/sol/02446/opgs/edr/ncam/NRB_614635291EDR_S0760988NCAM00595M_.JPG
However, several photos later, this image is captured:
Image taken at 2019-06-24T08:36:05.000Z
https://mars.nasa.gov/msl-raw-images/proj/msl/redops/ods/surface/sol/02446/opgs/edr/ncam/NRB_614635188EDR_S0760988NCAM00595M_.JPG
And this was the next image captured, 13 seconds later:
Image taken at 2019-06-24T08:36:18.000Z
https://mars.nasa.gov/msl-raw-images/proj/msl/redops/ods/surface/sol/02446/opgs/edr/ncam/NRB_614635201EDR_S0760988NCAM00595M_.JPG
The next 5 images didn't capture anything different than the first image, but following those, this image was captured:
Image taken at 2019-06-24T08:37:35.000Z
https://mars.nasa.gov/msl-raw-images/proj/msl/redops/ods/surface/sol/02446/opgs/edr/ncam/NRB_614635278EDR_S0760988NCAM00595M_.JPG
The remaining 4 images in the set of 21 were no different than the first image.
If you want to view the image as they appear in the collection, I've narrowed the images down by only searching for images from that specific day. They are the last 21 images in the listing:
https://mars.nasa.gov/msl/multimedia/raw-images/?order=sol+desc%2Cinstrument_sort+asc%2Csample_type_sort+asc%2C+date_taken+desc&per_page=100&page=0&mission=msl&begin_date=2019-06-24&end_date=2019-06-25&af=NAV_RIGHT_A%7CNAV_RIGHT_B%2C%2C%2C