I was amused to discover that in Eastern Europe, there are competitive events to test the ability of drivers and trucks to cross rough terrain. Having done this as a matter of routine in parts of Africa from time to time, I couldn't imagine why anyone would want to willingly subject themselves, or their expensive trucks, to the same hammering just for fun . . . but perhaps I'm too much of a realist sometimes!
Anyway, I thought you might enjoy a look at how they go about it (and sometimes fail). Here are a few videos portraying their trials and tribulations.
Looks like everyone was enjoying themselves . . . but I'd hate to be the one who had to wash those trucks afterwards!