Nasty way to kill a Closed Looper who Runs...

I mean, the young Looper and his older counterpart are trying to evade capture/execution, and then the old Looper has written marks appearing on his forearm that he thinks are leading him to a safe house, and then his fingers and limbs are starting to disappear, and he's eventually becoming mutilated and crawling to an address where his younger self has been strapped to an operating table and had body parts removed whilst being kept alive, so that the losses "pass on" through the timeline to the older self. And the address was not a safe house, but leading the old self to the slaughter and safe disposal.

Nasty way to go. That sequence always disturbed me. Not a bad movie, neither.