Hecho un coñaso a mi rodilla cuando he caido. I hurt my knee when I fell.
Sarcastically, I was told when I asked a guy while
backing up my car how much room I had, "No te preocupas, el coñaso te aviso!" don't worry, the smash will tell you.
Neither translates well and
I'm not sure if my grammar was correct but I laughed my balls off when I heard both.