well, seeing as people have already owned you on the "verbification" of the word parkour
ill tell you why they did and how to use it, seeing as most skipped that part
the word parkour is a noun. it is an art form, not the practice of one.
the common way of putting this into your head is: you wouldnt say "im going to soccer" youd say "im going to play soccer"
for some weird reason, it is ingrained into all traceurs heads early on that they should NEVER use it as a verb, and that they hsould be thoroughly annoyed when they hear it used as one. i really dont understand WHY it pisses me off, but, its oh-so-damn irritating!!!
lol
just refrain from EVER using the word parkour as a verb, or to describe someone, i.e. parkourist, parkourer.