Say you're marking a player, and his mum is on the sidelines shouting "HIT HIM JIMMY! SOCK HIM ONE!!" because he hasn't touched the ball for 80 minutes, and suddenyl BAM! long pass. What you do is intercept it with a nice volley, and aim it straight at the fat bitch.
It was a shame she ducked.
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There are some players who will go for the late hit and try to pass it off as a hard tackle. It just can't be helped.
Stuff like that is why I quit soccer and continued on with hockey. There's no way to take out your frustration (legally) in soccer. In hockey, lay them out with a big hit or drop the gloves (moreso at the major-junior to pro levels though).
If you hide it well, or time it just exactly, then you can crack them across the knees something awful... or so I'm told. Yeah, someone told me that.
But seriously, hide it well, or time it exactly and you can get away with murder. Or just hit the puck as hard as you can towards them and at an angle of about, what, 30 degrees?