I was watching the Apollo 15 landing and I noticed that after the LM surface sensing probes (contact probe) touched the surface, the view was clear which meant no dust was being raised, but all of a sudden, dust was being raised again which I initially though that the engine was throttled up. It's hard to explain it in words so here's the video clip for reference.
So what was the reason for dust being raised up and the LM shaking after the contact probes touched the surface but before the LM footpads touched the surface?