Heat Arms

 Heat Arms is a strange boss fought at the end of Lava Reef Zone. It'll first attack with two swaying antenna-like machines that fire a round of projectiles at you. The top circle part of each must be hit 4 times, a harder task for Knuckles who can only hit them when they come down.   Regardless if you destroy them or not, they will sink down and a Robotic hand that resembles the  final boss' at the Death Egg Zone will attempt to crush you and  leaves a moment for you to attack when it slams down, it takes six hits.  Unlike most times when the character is crushed this will not kill them but will act like a normal attack,  Super and Hyper Forms can damage the robot when it crushed down on them.  After it attacks once the antennas will come back if not defeated and continue that cycle, or that hand will come out again.  Over all this boss should give you little trouble and only serve up as a warm up for the much harder proper boss later in the zone.