When you think of the greatest fights in UFC history, it's likely bouts like Forrest Griffin vs. Stephan Bonnar at The Ultimate Fighter (TUF) 1 Finale or Chuck Liddell vs. Wanderlei Silva at UFC 79 come to mind.

Both fights made it to the scorecards. 

There's just something about a war of attrition with plenty of back-and-forth action between two highly skilled mixed martial artists going down to the wire.

But the flip side to that can be just as entertaining.

In that vein, the UFC put together a nice little video for its Ultimate Insider series that showcases four fights featuring knockouts that happened less than 30 seconds after the contest started.

After the jump you get to relive Don Frye destroying Thomas Ramirez (eight seconds), Gray Maynard eating up Joe Veres (nine seconds), Vladimir Matyushenko mopping the floor with Jason Brilz (20 seconds) and B.J. Penn boxing up Matt Hughes (21 seconds). Enjoy.