I imagine you'd want your whole team to cross the line!
Another thing there could be would be an internal timer where the start area, and subsequent checkpoints shake - and then drop!
It would take some time, so everyone gets a fair chance.
That's kind of what I like about this is that, if you do have someone struggling behind, it's good for a better player to show the straggler how it's done.
This especially comes up since the path does stop glowing, so you wanna make sure nobody forgets how to get through!