Step 1: Challenge a teamster to an honest round of fisticuffs.
Step 2: Mutually approach your opponent arms raised to protect your face.
Step 3: Wake up (potentially in the hospital) at least a fair fraction of an hour later.
Step 4: Find out, dazed and confused, that you were concussed right before the fight proper initiated from the bludgeoning of a baseball bat upon your skull by a second teamster.