1990. The Soviet Union was broken apart and people of the country happened to be people without work and money. To get some money numerous bus tours were organized by travel companies to Poland, Chekoslovakia, Romania and Yugoslavia. These trips were not to visit museums, but to sale goods from the USSR there and to raise some money. The coaches were overwhelmed with stuff and consumer goods and looked inside much more like a warehouse on wheels :) But the custom officers had strict orders about such coaches and prohibited entering their countries. Long queues on the border consisting of such coaches were 5-10 km long. We tried to pass border, were refused, turned back and came again trying to find an officer at a custom to give a bribe. I remember that 3-4 days on the border were a normal thing. But once our coach was refused to leave the country for 6 times and we waited in queues on a border 7 days just to leave. May be my answer is a little bit off topic but I believe there was no bus trip worse than that.