just my 2 sense worth.
if you are confident, you can actually put on a pair of skates and "pace" you subject on. that way you can pan more readily and easily. If in low light you can use a slave to freeze the image.
Something like this, i rolled beside the fella.
Also don't forget to ask them what they are going to do, aka transfers, gaps or even basic grinds/stalls.
By knowing what they do, it's better to get a great angle.
AKA if he's going for a 1/4 to 1/'4 transfer over the bank, it'll be great to position yourself just in front of the bank preferably with a fisheye (preference) to make the shot.
going under low isn't always the best option as sometimes the angle takes out the complexity/agility that the athlete is trying to demonstrate.
A pop Shuvit i believe is best taken from the front, and a kick/heel flip from the side.
again, just my 2 cents worth.
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