I would actually go with “Matrixes”. Matrices is the plural of “matrix” for sure, but since “Matrix” or “The Matrix” is the name of a particular thing (in this case, a prescribed sequence of actions) it doesn’t follow the same rule. In other words, you are not talking about actual matrices, you are talking about multiples of a trick called “Matrix”.
I don’t know how to describe it better than that, and I did not confirm that this is correct, but I’m pretty confident.
If I was ever faced with this problem in something I was writing I would probably give up and just write, “I did 3 repetitions of The Matrix today!”
(PS, don’t take any of the above too seriously… I just like language… )
Now i actually idk it differently. I land a normal trapeze and his brother (like if you wanna do the slack) and I take the yoyo off the string, twist my NTH and put the yoyo on the string closest to me (on the left). Its the same thing, but I do it like that, I find it easier.
Ive been working on landing this: world tour into a trapeze, dismount the trapeze like you are going to do a brother mount, but instead do a backwards world tour into a brother mount, dis mount that like your going into a double or nothing, but instead do a world tour all the way around to a double or nothing, then so on until triple or nothing. I found that it got kinda hard to land. I can do it pretty easily now though. I think i made this up, but if not, what is it called?