Appearance / Description of Object(s)
It had a cubical shape. It was a little far so I didn't see any more details. It was dark colored. I still don't know what was it, but I'm 100% percent certain that it wasn't a plane, a helicopter or anything that I've seen before.

Description of Area / Surroundings
I was in a plane, over the clouds.

Full Description & Details
I was in a plane, going to Prague. We were experiencing some turbulence. I saw thru the window on my right and i saw a flying object that i have never seen before. It was going the opposite way of our plane.

Can sighting be explained as any conventional man-made or natural object?
man-made definitely

Personal Background
Student

Views on UFOs, before and after sighting
I didn't believe it much, but I'm a believer now.

Reported Sighting? No
Location: Skopje, Macedonia
Age: 23