I accidentally invented a perpetual motion machine. When I was working on a crane, I put too high value for max hydro expansion. When the hydro tried to expand more than the structure allowed, it broke down and the boom it was attached to started swinging around and accelerating.
This one popped up in a recent vid (below, but won't start at glitch - jump to 6:21): I put the game in slow motion while holding a traffic cone by the tip. The thing went bananas! It stretched out, spinning, then accelerating out of control until I let it go. Crazy stuff! (BTW, it happens at the 6:21 mark)
Powertrain instability caused rear wheels to fly off and front wheels to start spinning very fast (without any engine power). Resulted in some sick burnouts and fwd drifting.
I was driving a stripped back Wentward DT40L with rockets for my top speed test with wind helping and when I passed 450MPH, the rear right tire inploded and only the inner wheel of the dually can be seen and I think it was quite interesting as I never knew the inner dually actually works on its own
My funniest thing is simple: Drop any vehicles from very very very very very very very very very very very very very very very very high height under the help of the gravity of sun and then see the "instability detected"message shows up.
When you know spawning truck then attaching it to a trailer and using it for traffic tool will resulting an unexpected... thing (?) Anyway, this pic i get from 0.17
Using a jbeam as a mesh results in the vehicle flattening like paper and then exploding into a glitchy mess
I think you may have sneezed on the scaling factor for that and instead of 1 you may have put in 100 or something to cause THAT glitch! xD
There was a glitch briefly introduced in 0.18 where the lights on the Hopper's windshield bar would spontaneously explode, but I believe that's been patched already.