I hope you appreciate how lucky you are to still have your car in one piece
once you start fishtailing violently there's not much you can do except "try" to steer it back and taking your foot off the gas a bit. Had you slammed on your brakes your story coulda been a bit different. After quite a few close calls myself i don't speed or screw around with corners at all anymore. You can buy handling kits from like Saleen, Maximum Motorsports, Kenny Brown, etc. that are split up into stages depending on your budget and are usually prioritized as to what you want to do. All it takes for the mustang rear end to slip out is a small dump around a corner to disrupt the balance and have your traction-lok kick in to get you going around....not so fun.
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'84 Mustang 5.0 LX
My car