A bumper capable of providing decreasing reversionary impact forces upon an impacting collider as the bumper is compressed, comprising: a bumper cover; a scissor mechanism housed within the bumper cover, comprising: a forward extension member proximal and having a parallel axis that is parallel to a parallel tangential axis of the bumper cover; a rear extension member parallel to the forward extension member, and distal from the flexible bumper; at least left and right long scissor members (120, 122) that, proximally to the bumper cover, are rotatably and slidably associated with respective slots (110, 112) in the forward extension member, and that, distally to the bumper cover, are rotatably associated with the rear extension member; and at least left and right short scissor members (134, 136) that, proximally to the bumper cover, are rotatably associated with the front extension member, and that, distally to the bumper cover, are rotatably associated with a respective one of the left and right long scissor members (120,122); wherein the left and right short scissor members (134, 136) and left and right long scissor members (120, 122) are capable of compressing the forward extension member toward the rear extension member with decreasing reversionary force along a force vector along an impact axis of an impact by the impacting collider. a bumper cover; a scissor mechanism housed within the bumper cover, comprising: a forward extension member proximal and having a parallel axis that is parallel to a parallel tangential axis of the bumper cover; a rear extension member parallel to the forward extension member, and distal from the flexible bumper; at least left and right long scissor members (120, 122) that, proximally to the bumper cover, are rotatably and slidably associated with respective slots (110, 112) in the forward extension member, and that, distally to the bumper cover, are rotatably associated with the rear extension member; and at least left and right short scissor members (134, 136) that, proximally to the bumper cover, are rotatably associated with the front extension member, and that, distally to the bumper cover, are rotatably associated with a respective one of the left and right long scissor members (120,122); a forward extension member proximal and having a parallel axis that is parallel to a parallel tangential axis of the bumper cover; a rear extension member parallel to the forward extension member, and distal from the flexible bumper; at least left and right long scissor members (120, 122) that, proximally to the bumper cover, are rotatably and slidably associated with respective slots (110, 112) in the forward extension member, and that, distally to the bumper cover, are rotatably associated with the rear extension member; and at least left and right short scissor members (134, 136) that, proximally to the bumper cover, are rotatably associated with the front extension member, and that, distally to the bumper cover, are rotatably associated with a respective one of the left and right long scissor members (120,122); wherein the left and right short scissor members (134, 136) and left and right long scissor members (120, 122) are capable of compressing the forward extension member toward the rear extension member with decreasing reversionary force along a force vector along an impact axis of an impact by the impacting collider.