People fall, and sometimes it comes off as funny to an observer, or even to the victim. Two things that should be considered, however, are POV and the tone of the scene (in my opinion, of course). If the "faller" is the POV chracter, and the author has dialed the POV in close (in the character's skin) so the person's reactions are being detailed, will the fall be funny to that character? If the POV is close and jumps to a more distant narrator, then back in close with the POV character, it could jolt the reader. As for tone, it's pretty much the same thing. If the scene is one of suspense, or significant tension, will a comedic fall break the tone for the reader? If it is written as too humorous, and the author then tries to get back to the tension of the scene, it could come off as disjointed to the reader, or the feeling of suspense/tension could be lost.
A fall on a wet floor is not necessarily cliche. Slipping on a banana peel is.