I know that was a year ago, but I confirm that, while practicing Syndra jungle, I noticed the rift scuttler went insane pretty much every time I was killing it, which I usually do because it lets me heal up after fighting a buff monster.
It often emits the alarmed lightning bolt particles after I throw it, and then sometimes runs around in a way faster and more erratic than I ever see when attacking it with meta junglers. It runs in stranger directions than usual, at speeds at least comparable to when it hits the limit of the river and flees back past you to escape. It feels faster, because it's short, crazy dashes in various directions, sometimes zig-zagging.
It will occasionally even do a sort of stutter-step, like it might do if I pin it against a wall with a normal jungler, but will do it right out in the open, when neither I am nor the landscape is close enough to block its movement.
Yes, Syndra jungle. Doesn't work as well as Morgana or Brand jungle, but if you have a competent team it can work at low to middlin' elo. Can't carry with her if your team is weak, though. Vel'Koz was even more disappointing.