So here is my promised tutorial on Wall Clip. To practice:
Step #1: Start by practicing coordinating the jump. Find a corner and wall clip with only 320 ups.
Step #2: Include Strafing.
Step #3: Try some of the tricks in the video.
Don't stick only to the tricks, it's the mechanics you have to learn. And they are extremely easy. This is a situational thing which may or may not come in need during matches.
By the way, vertical wall clip is also possible :)
