According to one embodiment, a roll-in cot may include a support frame, a pair of front legs, a pair of back legs, and a cot actuation system. The first electrode and the second electrode may be attached to an insulative film. The light emitting unit emits a color light beam. Next, a harmonic wave form may be created. The bottom legs may extend generally horizontally outwardly andor inwardly from the sidewall, and may be contained in sleeves attached to a floor andor an external skirt of the containment berm. The present invention concerns also the associated device.