Braking, how to?

dr.oblong i don't want to spoil your fun or anything but skidding is 1 thing, stopping quickly is another.

an emergency stop should involve moving your weight back, this allows you to use more front brake (which does most of the work) and helps to keep the back wheel on the ground (which helps). if you ride fixed you've got the nearest thing to ABS braking that a (simple) bike can have, make the most of that. using your legs to control your speed on steep descents will help you develop the muscles for this (and skidding).

weight forward skidding is fun, trendy and profitable for tyre manufacturers. and a hop-skid can allow you to change direction quickly (like a hand brake turn), but locking your rear wheel is a stunt that is best to avoid (if you can) in an emergency situation. not least because if you end up side-ways in heavy traffic you will increase you chances of being hit from behind.
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I tend to agree with this, mostly.

front brake + weight back + resisting with legs will stop you just about as quickly as it's possible to stop any bike.

In real emergencies I've endo-ed a bit and when the rear wheel goes back down you stay stopped.

Brakeless riders don't and can't emergency stop like this, they ride in a way so as to avoid rather than run into, obviously this depends on the skill of the rider, and the ability to bail safely if something really unavoidable occurs