For the scientists -->
Stunt? It's a necessary test step. You've acquired all the data and proved it will work in isolation. Now to connect it and confirm nothing untoward happens. It's a tick in a box (at least you really hope it's just a tick in box rather and you don't up fuck the grid) but until it's done, you don't know. And watching it work makes you feel good; it's an emotional payback for all the effort.