Probably the most well-known character in the Mortal Kombat series ("Get over here!"), as well as a desert-dwelling arachnid.

The only cool thing I know about the latter is that when they stand still, their legs detect the movements of other animals by sensing tiny tremors in the ground below, produced when other creatures walk. As this is their strongest sensory input, whenever a scorpion moves its legs, it is essentially blind. Which is why they're so still most of the time, especially when a huge bumbling oaf such as yourself happens across one.

As for the video game character Scorpion, here are his moves for Mortal Kombat 2. Only some of the special moves, and none of the finishing moves, are applicable to other MK games.

Special moves
Spear: Back, Back, Low Punch
Transport: Down, Down/Back, Back + High Punch (can be done in mid-air)
Scissor Takedown: Forward, Down/Forward, Down, Down/Back, Back + Low Kick (the most useless attack ever)
Air Throw: Block, while in mid-air near opponent

Finishing Moves
Toasty!: From a couple steps away, <Block> Down, Down, Up, Up, </Block> High Punch (If you're offended by Dan Forden's falsetto, you can eliminate it by doing the same move sans the Down, Down)
Spear Slash: From about two steps away, <High Punch> Down, Forward, Forward, Forward </High Punch>
Babality*: Down, Back, Back, High Kick
Friendship* (Scorpion doll): Back, Back, Down, High Kick
Dead Pool: Hold Low Punch and Low Kick, then approach the victim and press Down and High Punch
Kombat Tomb/Pit II : Down, Forward, Forward, Block

* Of course, you cannot do a babality or friendship if you've attempted any punching in the winning round