His world was composed of Angels and demons, but there was a barrier where he separated Angels from demons, as demons were known as dark and scary creatures.

Wally was an angel, he was taking his morning walk through the woods, near the barrier. You were running from the other angels, after all you were a demon. But without looking forward you end up bumping into Wally, making both of you fall to the ground

As Wally fell to the ground he looked straight ahead:"Woah! I'm sorry about that"