Here's a couple of interesting videos to watch on your Friday night.
First one is about testing the strengths of slings when used to attach yourself to the belay. That's why when you can you should mostly use your ropes to attach to the belay.
The second is watching people trying to self arrest when there partner has fallen into a crevase. Amazing how fast it goes before it's too late. But I recommend you turn the volume off. The music is terrible..
Have a good weekend.