The flip that broke the Daniels back
The flip that broke the Daniels back refers to an idiom. Eventually something that is just a fun activity will become a dangerous stunt and that last flip is the flip that broke the Daniels back. It can also be referring to a seemingly minor action that causes a unexpected reaction such as breaking your back.
They kept piling straw onto that poor camel. Eventually they had piled too much and that last straw, that's the flip that broke the Daniels back