im yelling "parkour" but in a way that lets you know i'm aware of the french colonial roots of the discipline

 its jumping but cooler. it's cottonmouth of course. and glog maybe cause it's for GLAUGUST.
 

heart in the stomach in the sky

 idk movement in ttrpgs is hard to make fun but i guess i'll do it effortlessly or whatever

doing like a cool parkour stunt just involves calling out the point you are starting from and the point you want to end at. 

another player rolls 1d4+2 and calls out or solicits that many different elements in the environment between your starting and ending points. these can be created on the spot or chosen from preexisting descriptions depending on your tolerance for altering the fiction. you must use all of those elements to make it from your starting point to your ending point. 

the following actions are at your disposal

jump (move laterally or gain altitude, gain more OR both by spending momentum)
swing (move laterally, gain momentum, can gain altitude by spending momentum)
climb (gain altitude, requires holds)
wall-run (move laterally, lets you jump off vertical surfaces, gain momentum)
slide (move laterally, gain momentum)
roll (move laterally, preserve momentum)
ride (move laterally, gain or preserve momentum, requires moving object to ride)
flip (redirect momentum shhhh i know that's not real) 

every action has an X-in-3 chance of failure as exhaustion sets in. X is the number of times you have previously taken this action on this route.

so like. i'm in a library and I want to get from the top of this bookshelf i'm standing on, up to the second floor balcony

another player rolls 3 elements and gives me 
- a chandelier
- the head of a patron
- a book cart

gonna tip the bookshelf and ride (1st) that down onto the cart to gain some momentum, roll (1st) off of that cart to keep it going onto the patron's head, flip (1st) to redirect momentum upward and jump (1st) off of them, spending that momentum to reach the chandelier, then swing (1st)  from that onto the balcony. 

if the cart wasn't close enough to the patron i'd have to ride it (2nd, with a 1/3 chance of failure since I've already taken that action once before) as well to get near enough to the patron. 

if the balcony was higher up than the chandelier i'd have to swing (2nd, 1/3 chance of failure as above) again to gain momentum to spend on gaining altitude. 

fall faster