[UPDATE II: Via the comments, another non-private version of the
altercation]

[UPDATE: Sorry folks, the Youtube poster just made the video
private. A brief description: A small St. Patty’s day celebrant
appears to insult a giant Chicago cop. After a brief yelling match,
the cop lifts the small man off his feet by his throat, carries him
across the street, pushes him to the ground (by his throat) and
arrests him.]

Via Wonkette