This picture is not for the faint of heart! It is a demonstration of the (otherwise excellent) Zuiko 35-80/2.8's barrel distortion at 35mm. I would say it is quite shocking indeed!
The picture was graciously scanned by Hans van Veluwen. Thanks!

Shot with OM-4Ti + 35-80/2.8 at 35mm, the diaphragm was most likely set to f4, and no tripod was used. The barrel distortion can clearly be seen in the top and the bottom of the picture, just look at how curved the (in real life straight) lines are! :(