“He’s got a lot of controversial stuff going on and rather than thinking it through, I’m afraid that he’s jumping into the frying pan with both feet.”  https://www.washingtonpost.com/politics/these-iowans-voted-for-trump-many-of-them-are-already-disappointed/2017/02/26/18f86b86-fa8d-11e6-be05-1a3817ac21a5_story.html?utm_term=.6d88c9bfc441.   This is a mashup of “out of the frying pan and into the fire” (from a bad situation to a worse situation) and “jump in with both feet” (to become involved quickly and completely).  “Jumping to conclusions” (to decide something without having all the facts) was also on the speaker’s mind, I think.  It is an excellent mixed idiom, as the two combined mean to get into a bad situation quickly, which is what the speaker I believe was thinking.  And the mental image of one jumping into a hot frying pan with both feet certainly would create a bad situation!  Kudos to Linda Bernstein and Barry Eigen for spotting this one and sending it in!