Heavy crash nearly kills my Laptop

All I do was switching from borderless to windowed- The screen starts flickering and zooms rapidly while it was more and more lagging. After a few seconds I tried to close the game, but it didn´t work. So I hit strg alt entf and restart my laptop. It took minutes before something really happened, but now it runs normally and my save game is still there.

It´s freaked me out…

Version: 0.14.0