“Well, you’re goin a go where you look. Army didn’t get you?” The thunder sounded far to the east, moving from them in its red wreaths of light.
“They can’t get no use out a me. Got some crushed vertebrates. And a stress fracture, the arm bone here, you know how bullridin you’re always leverin it off your thigh? -- she gives a little ever time you do it. Even if you tape it good you break it a little goddamn bit at a time. Tell you what, hurts like a bitch afterwards. Had a busted leg. Busted in three places. Come off the bull and it was a big bull with a lot a drop, he got rid a me in about three flat and he come after me and he was sure faster. Lucky enough. Friend a mine got his oil checked with a horn dipstick and that was all she wrote. Bunch a other things, fuckin busted ribs, sprains and pains, torn ligaments.
-Brokeback Mountain by Annie Proulx-
What does the bold sentence mean?