there's games by bjjscrambler and they're wrestling games and you can grab with the left and right and you can fall and release grips and there buttons in the right corner and you can control them with q and e and r and z and i need to know how to put that script into my game i would really appreciate it if you would help me.
To answer your question directly, which is "How do I get a grab script?":
Steal it from the game itself by hacking (Against the law)
Pay someone for it (which is technically against Roblox Terms and Conditions)
Learn to use Lua to script in Roblox yourself and make it yourself just the way you want it
For the third option, I recommend this tutorial to get you started:
http://wiki.roblox.com/index.php?title=Absolute_beginner%27s_guide_to_scripting
You'll need to know about using the Mouse
Object to get key presses, Weld
Objects for animating players, GUI
Objects to show onscreen controls, etc...
Also, remember that this forum is for helping people with scripting - not helping them GET scripts! :)