Top Descriptors bursts Patterns requiring continuous movement and alternating, typically 9 notes or less. , wide aim Patterns, usually jumps, with heavy use of wide angle movement. , symmetrical Employs symmetry within the map design, often mirroring elements along the horizontal centreline. , difficulty spike Contains a sudden and significant increase in challenge within the map's gameplay. , alt Colloquial term for maps which use rhythms that encourage the player to alternate notes. Typically distinct from burst or stream maps. , collab A map with two or more associated mappers.