Multidirectional gear anchor
In some situations, it can be good practice to be sure your gear anchor can handle a strong upward pull.
As in the diagram below, when you're doing a fixed point lead belay off the anchor.
You have a heavy climber and a lightweight belayer, and there's a chance of the belayer getting launched into the air when they catch a fall.
Bolts, of course, are multidirectional. Cams, to a lesser degree, are also multi directional because they can usually pivot if the direction of force changes.
Most passive gear, like stoppers, are usually not multidirectional. In a typical anchor, they might be great for a downward pull, but have very little security if they suddenly take an upward pull.
There are a few ways to do this. Assuming you have some kind of gear placement down around your feet that can take an upward pull, this method is simple and effective.
Clove hitch yourself to the master point.
Take the rope from the backside of your clove, and clove hitch it to the upward directional piece by your feet.
Voilà, your anchor can now take an upward pull.
image credit: Georg Sojer / Chris Semmel / VDBS