After the tidal wave passed.
Lu Xing's flying house turned into a boat mode and landed on the surface of the ocean.
Then, Lu Xing began to search for Ma Shaoyu and the seven others, not knowing where the recent tidal wave might have swept these people off to.
When Lu Xing finally found Ma Shaoyu and the others a few kilometers away, they discovered to their surprise that these individuals were actually having a blast. The presence of swim balls kept them afloat on the ocean surface, which was calm and waveless. As they ran and exercised inside the balls, the swim balls rolled forward on the sea surface.
Thus, Ma Shaoyu and the others were as happy as if they were on vacation, completely forgetting the previous tidal wave, carefree to the extreme.