fitting performance

Text: using a half round cut out wooden object, which is hollow inside, giving a limited amount of space for one to fit into the cupped piece.
Used in a public indoor environment, creates the most common question of can I help you, my reply was to push me in the middle. Yet the half round Object was in an angle, that could not stay in the middle for longer than a few seconds, when my body was squeezed inside trying to balance a middle point. Some bypassers did not show any reaction except looking.
Using a wooden board as a lid, gave me more experimentation option of body and equalizing an unbalanced entity.