Love is a Danger Zone

Despite its later fame, the song's REBIRTH debut was so plain that almost nobody picked it, and it was written off as an unpopular track. Its turnaround came in Pump It Up EXCEED 2, when a difficulty rework instantly pushed it into the rotation of fan favorites. ZERO then added a Part 2 and a Cranky Mix, turning a single song into a full series. Its most important contribution was codifying the extreme hip twist: keeping the upper body squared to the screen while the lower body rotates nearly 180 degrees. It was not literally the first chart to do this, but having the design team deliberately build a high-difficulty twist pattern was unusual for the time, and those twists became the identity of the entire Danger Zone series.

The spread runs from the gentle S4, a good first taste of soft twisting, up to demanding high-level charts. S11 (added in FIESTA EX) reworks the NXA Danger Move mission. S17 comes from REBIRTH's Division All-Wild chart and is lopsided: it coasts at a far lower level for most of its length, then ends with a relentless run of tricky twists. S19 and D21 are go-to graduation charts for their tiers, packed with stairs, double-clicks, and wide-angle twists. D11, absurdly rated as Double 6 all the way until XX, is a textbook example of how badly old low-level Double charts were undervalued.

On the D21, designer WINDFORCE (Choi Kwon-sik) famously all-comboed it blindfolded on OnGameNet's DotheG, declaring that "Pump is a sense." In PHOENIX, clearing it at SSS+ grants the PUMP IS A SENSE title, and SSS or higher grants Twist Lv.7. The Co-Op chart simply hands the D17 to 1P and mirrors it for 2P; until XX both players' notes were read together, so a miss by one cost the other a note too, a quirk fixed in PHOENIX. The song's BGA is famous for being so busy it can obscure the arrows. There is also a full version running just over four minutes with a different tone, which never made it into the arcade.