These are a couple of my Scree Runner robots from Brickfest 2002

For this event, the 'robot' had to climb a pile of 'Scree' (or in this case, LEGO blocks).  The angle started at zero, and went just above 45 degrees. The winner was the one that could climb the scree at the highest angle, in the fastest time.

This 'Scree Runner' was designed to reach out and touch the finish line.

A more legitimate Scree Runner (also mine), named (by the crowd) X-BOT

For the first pass, the Scree was flat

X-BOT wasn't able to climb INTO the scree once the table was lifted beyond 45 degrees

There was good competition from Doug Carlson

Doug & Too Much

X-BOT was good enough to take home the big prize