Wed Sep 21 09:17pm EDT
Just after the start of the second half in the Copa Sudamericana match between Nacional and Universidad de Chile, a linesman was hit in the head with a streamer/cash register roll thrown from the stands. The linesman was reportedly carried off a stretcher and the match was abandoned.
Goals in the 11th and 12th minutes had the home side, Nacional, trailing 2-0 at the time of the headshot, so it was most likely the work of a disgruntled fan. A disgruntled fan with an impressively accurate throwing arm.