A great simulator is a sandbox that lets you play around with all kinds of conditions and environments. But let's be honest: The most fun thing is to just destroy the hell out of all those cars, trucks, planes, or whatever else you can pilot.
is a wonderfully detailed sim, and it has inspired a robust online community of people posting videos of their largely destructive exploits. just rounded up a few of the most satisfying demolition derbies. Take this one, in which someone drives vehicles over 100 consecutive speed bumps until they shake apart:
...or this one, in which car after car drives across a spike strip at high velocity and then careens to its satisfying doom:
If you don't really need to be productive at work today, then go get lost in more videos at . The Polygon channel has great BeamNG videos as well.