Swedish result of Chem-trails?

So I was going to the Supermarket and then i saw this very large cloud that looks like a straight edge.

One of the aiplanes is going straight towards the cloud. The other two is flying towards each other but with a pretty big distance in between.

The cloud was moving pretty fast, and after a while the edge was gone, but the clouds were blocking the sky totally by then, all of it happened in about 15 minutes.