A glass tube in Super Metroid. This tube must be blown up to allow access to Draygon, the boss of Maridia. This is the first time Power Bombs are required to advance. Questions asked about this on the GameFAQs Super Metroid board will be stabbed with a spork.
OMG how do I get to Maridia boss!?!?!?! HElP ME!!!1!1!1!1!!