Are you familiar with the term
clumsy? A clumsy dancer will step on toes. A clumsy soccer player will make unplanned things happen.
Also a good word is klutz. Klutz is probably the word you are looking for because it is somewhat idiomatic probably from German or Yiddish, but definitely known by anyone in the USA. It may not be as bad as two left feet, it surely refers to someone who is likely to stumble.