Area Room Category Name Difficulty Video
Norfair Ice Beam Gate Room Any% No Blue Entrance (KPDR) Advanced Video
Running under the gates without blue suit lets you Space Jump through the next room. Saves 45ish frames if done right.

You want to press and hold the shot button while in the transition, and when Samus flashes once from having a full charge release both shot and run then arm pump.

When in the next room you need to jump as soon as possible and really low. Then so another SJ as low as possible.