In the late afternoon of May 28th Robbert was not feeling well and had gone to bed (highly unusual for him, since he normally goes to sleep around dawn).  He thought he had fallen asleep and had a "dream" in which he saw a brilliant white light-ball come down directly into a field on the outskirts of Etten Leur.  There are no houses or farms nearby but there is a big windmill just before the turn onto the road to Etten Leur--and Robbert clearly saw the windmill in his "dream" next to the turn-off toward Etten Leur, as well as the field where the light-ball had descended.

Later that night Roy Boschman arrived to take Robbert out to dinner and, by then, Robbert had dismissed the event as simply a "dream."   But, then, as they were driving home Robbert suddenly got a feeling that perhaps it had not been a dream and asked if Roy would drive to the field so they could check.  Once at the field they found one small circle in the tall scruffy grass.

The photos below (taken the next morning in sunlight) show how impossible this small circle would have been to find unless Robbert had paid attention to his "dream."