Crossway
Crossway is a room in the Chozo Ruins region of Metroid Prime.
Without Boost Ball
It is possible to traverse Crossway without Boost Ball by executing a halfpipe bomb jump (HPBJ). This HPBJ can give players trouble, but it is significantly more lenient than the one in Ventilation Shaft. With good execution it is even possible to perform without the unmorph.