In the movie The Naked Gun 2 1/2: The Smell of Fear, there is a scene in which Frank Drebin (played by Leslie Nielsen) and Jane Spencer (played by Priscilla Presley) are at a pottery studio, and they end up getting splattered with clay from a potter's wheel that spins out of control.
The potter's wheel was rigged to go faster than usual by the villainous character Quentin Hapsburg (played by Robert Goulet), who had set a timer on a remote control to speed up the wheel after a certain amount of time. This was part of his plan to distract Frank and Jane so that he could steal a valuable vase.
As for why Frank and Jane didn't seem to care about getting covered in clay, it was likely played for comedic effect. The Naked Gun movies are known for their slapstick humor and over-the-top antics, and the scene with the potter's wheel is no exception. Frank and Jane's nonchalant reaction to getting splattered with clay adds to the absurdity of the situation and the overall humor of the movie