I guess I should add some insight:



Seated skids.
A seated skid may be challenging but it is possible depending on your lower body strength. The methodology of performing such a skid involves coordinating both legs, with one leg pushing downward and the other pulling upward, effectively locking the drive train an putting the bike into a skid. It is preferable you have your dominant leg push down (the leg you tend to use first while going up a flight of stairs) and the other pulling upward.

Ambidextrous skidding.
You may have heard this term while calculating the number of skid patches for your gear ratio. That magic button that automatically doubled the amount of skid patches you had no matter the ratio to your eyes amusement. What it is, is the ability to skid with either dominant or non-dominant foot in front while in a skid. The method to getting this down is by practicing your leg's coordination; effectively changing your skidding habits. To put things in perspective while you practice, try rotate between having your dominant and non - dominant feet in front or back while in a skid.

Moderating speed with bunny hop skids.
Often times you find yourself going too fast and without a brake because in hindsight it was worth it to be "cool" and what's "in". You've judged doing a complete skid to a usual stop too risky or outright impossible because your legs aren't strong enough to handle the torque of our bike's drivetrain. You might tip over or get speed wobbles and eat asphalt with a side of road rash. What do you do? You can moderate your speed by doing bunny hop skids. If you've ever seen a FGFS "edit" video, you might notice that riders pop up their rear wheels a couple of times right before performing a trick. That is a bunny hop skid, it helps moderate speed at minimal effort in the case you're going too fast. In essence its name describes what it is. A bunny hop skid can be described as a mini skid where you would stand up while leaning forward and hop up while in your toe cages. What this does is, you will pop up your rear wheel off the ground and into the air, slowing it down, and in principle the drag of it will slow you down as a whole when it makes contact with the ground again. This may seem to do little in slowing you down but it is meant to be done multiple times continually until you're at the speed desired, able to perform a longer skid, or apply enough backpedaling to stop.