i 9 tap when i am attempting to clip into the hill at 1:44. if i get it on the 8th try, i can still potentially get a 1:37, so if you are decent at 6 tapping you could with even more attempts. i missed it but if you lightly jump at just the right time you can clip under the slide at 1:51. i have tried all the different set ups for the loop clip and i can't get a good visual cue for any of them. my method is i stop, 3 tap, then do a mid jump at the corner of the dark brick. (when i mid jump i piano roll once lightly) if i land on top, i do the same but with a 4 tap. if i land on the bottom, then i 4 tap and full jump at the later part of the outlined brick below me