A support panel assembly includes a lower panel, an upper panel pivotally coupled to the lower panel by a central pedestal, and a first pressure sensor located about a center of the support panel assembly, and coupled to the central pedestal. The first pressure sensor detects pressure exerted into the upper panel in response to the upper panel pivoting in relation to the lower panel about the central pedestal. The first pressure sensor outputs a pressure signal indicative of pressure exerted into the upper panel. In at least one embodiment, the pressure signal is received by a detecting control unit.