Strange Contrails

I took a few snaps today but this one is just that little bit unusual enough to win the day.
We were in the garden after having Sunday dinner outside and I watched a civilian aircraft flying over. It was leaving a contrail but must have also been flying through the thin cloud that was hanging in the otherwise brilliant blue sky.
The end effect was a disturbing of the cloud that left a gap rather than the contrail filling it in.
A little bit different anyway from my usual doggy or aeroplane blips.