Dic: jump somewhere (or + adv/prep) as meaning a hasty movement or change

[1] move fast: to move quickly or suddenly in a particular direction (= leap)

• Matt jumped up to answer the phone.
• We all jumped in a taxi.
• She jumped to her feet and left

[2] keep changing: to change quickly and often from one idea, place, position etc to another─used to show disapproval..

• Cathy kept jumping from one topic to another.
• I've been jumping about the file instead of working straight through it.

[3] miss a stage: to move suddenly to a further part of a book, discussion, leaving out the part in between.

• I'm afraid I jumped a couple of chapters.
• The movie suddenly jumped ahead to the future.

[4] jump to conclusions: to form an idea about something before you have all the facts.

• There may be a simple explanation. Let's not jump to conclusions.

.... LDOCE