Scary stuff ! https://www.bikesportnews.com/news/news-detail/big-balls-corners-the-isle-of-man-tts-fastest-five
One of my favourite places to watch is just by Ballacrye, 150mph!!! F### that!! Gladiators, all of them.
I've saved the page to read later, done a few fiendish laps but not at manic speeds. The topology of the island is never relayed in the videos. Only glimses of such are from the helicopter ariel views. Thanks for sharing @Wassy