[quote=Tv Tropes - Tap On The Head]
In fictionland, anyone caught unaware may be easily, instantaneously and noiselessly incapacitated with a single blow to the head (or alternatively, a karate chop to the neck). A character thus treated will usually be perfectly fine afterwards; at worst they may have a headache, dizziness, slightly blurred vision, or in the very worst cases, Laser-Guided Amnesia. The real danger to their health is not the aftereffects of head trauma, but the Bad Guys standing around the operating table (or other heavy piece of furniture) to which they've been tied down. In other words, being clobbered on the skull has no real lasting effects which could hinder our protagonists for the rest of the plot. (This is why In the Back does not apply — hitting someone from behind is not really dangerous.) 
Needless to say this is not Truth in Television at all; any head injury sufficient to cause unconsciousness may also lead to concussion, brain damage, or death, and at the very least requires prompt medical attention. In fact, even momentary unconsciousness is an indication that a concussion has occurred. 
But in fiction, particularly in action genres, being knocked out is treated as nothing worse than a particularly hard nap. Heroes wantonly deliver painful and dangerous concussions to guardsmen, and friends knock each other out in disagreements, with little acknowledgement that brain cells are dying. In many role-playing games, knockout punches are actually treated as a form of nonlethal damage from which you recover quickly. Contemporary audiences are becoming increasingly canny about this, meaning the characters now typically use more elaborate, realistic, or permanent techniques for dealing with opponents. 
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[url=http://tvtropes.org/pmwiki/pmwiki.php/Main/TapOnTheHead]Source[/url]

Although in Rp We hold a small amount of suspension of disbelief.
As such the[url=http://tvtropes.org/pmwiki/pmwiki.php/Main/RuleOfCool] "Rule Of Cool " [/url] Applies