A bumper apparatus comprising a mounting structure attachable to a surface, and a bumper assembly slidably and removably engaged with the mounting structure. The mounting structure comprises a bumper assembly engagement structure. The bumper assembly comprises: a mount engagement structure for longitudinal slidable engagement with the bumper assembly engagement structure, a bumper attached to the mount engagement structure, and a biasing mechanism. In use, the removeable bumper assembly rests upon a biasing mechanism retaining structure attached generally to a bottom end of the mounting structure, in a neutral position when no unbalanced external force is applied at least partially longitudinally to the bumper assembly. When the bumper assembly is acted upon by such force applied toward the biasing mechanism retaining structure to move the bumper assembly into a lowered position, the biasing mechanism biases the bumper assembly upward, toward the neutral position.