I disagree with Tempest a bit. Fancy maneuvering can be useful in certain combat situations.
"Sukhoi deputy general designer Konstantin Marbashev told Chris Pocock, from Aviation International News, at the Paris Air Show, that the TVC flight test program with the Su-37 prototype had been completed and that many changes were made along with successful testing of the system in yaw as well as pitch, and with differential thrust. Now this confirmation brought the Su-37 VTC evolution into a new level of capability from what we have just seen a year earlier at the Farnborough Air Show. In fact, with "yaw" now as an interactive part of the pilot's control inputs, the Su-37 could exceed the maneuver potential of the F-16 VISTA, the X-31, and the new F-22, because they are either yaw-channel limited or require yaw-thrusters.
Yaw control, integrated with the pilot's standard rudder peddles, which in the fly-by-wire Sukhoi jets are not dis-abled and retain mechanical-electrical backup mechanisms, offer greater tactical freedom to the pilot once committed to the ultra-close dogfight that will feature VTC maneuvering. In-Close, Stay-Close, and Kill-Close would be one way to defeat the new generation of all-aspect, high-off-boresight missiles such as the R-73, Python 4, MICA-IR, and AIM-9X. Obviously one has to survive the transit from beyond visual range (BVR), to within visual range (WVR), to inside of minimum range. Once there however, both Western and Russian gun systems are capable of all-aspect, high crossing angle kills at ranges inside of 1500 feet. The final problem, of course, would be surviving the explosion and resulting trash that would follow the kill."
http://www.sci.fi/~fta/Su-30.htm