BACKGRID
An overly excited Lionel Messi fan found out what NOT to do when in the presence of the international soccer superstar -- getting roughed up by security after running toward him at a youth event.
The chaotic moment happened at the Inter Miami CF Academy's Dreams Cup at Florida Blue Training Center over the weekend ... which the GOAT himself and teammate Luis Suarez attended, taking a seat on a bench under a tent to soak in all the action.
At one point in the appearance, footage shows a young supporter -- decked out in a No.