He was not using an organically raised free range hammer.
So she hit him over the head with and then set the hammer free.
This is all Chris's fault. He should follow the rules more often. Workman wasn't supposed to be working on Chris to begin with.
He didn't bow to her, so she made him.
Chris Martin's blowjob technique made him faint, it was just a bump on the head.
He bypassed the tradesmen's entrance and dared enter by the front door. An appalled Gwyneth lobbed him on the head with a Mario Batali by Dansk™ 9" Enameled Cast-Iron Square Baker in 'Persimmon'.
Apple was just playing, shaking the ladder he was standing on, you know - playing. He had the NERVE to tell her "No". MY child, my precious baby, and that foul pleb spoke to her.
So I smashed his head in with my Oscar.
Goop hit him with a frying pan when she caught Chris being fucked into the couch by the worker.
There is no way she would let anyone have sex on the couch.
Clearly he banged a hammer against his skull in response to Gwen being insufferable.
It's only "mysterious" because people usually don't suspect such an injury is self-inflicted.
Waiting for the lawsuits to come in.
She started telling him what he should eat and why, so of course he had to bang his head against the wall a few dozen times.