Things got pretty interesting in the Rockies-Mariners game on Saturday, July 21 at Coors Field.
Forget the fact the Rockies won, 4-1.
In the fifth inning, a fan went on to the field and ran from the outfield to the seats down the left field line.
He should have stayed on the field. A fan came out of his seat and absolutely clocked the runner as he tried to race up the steps.
Form tackling at its finest.
Check it out from various videos on Twitter.