That's something new, riding a bike in a tunnel at 70+ KM/H.

At most I can push my 200USD bike to 35KM/H for around 20~30 seconds, then run out of ATP. I assume their bikes are more expensive and thus easier to push. But still, 70+KM/H for 3 minutes is still pretty hard.

Also, some scenes you see in the video are extremely dangerous, like following the SUV to keep speed. You can reduce drag by following a vehicle, but unlike profession competition, the car in the wild might start to slow down at anytime. A slight tap on the brake, and you're f*cked up.
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"Late for Work" | The Tunnel Run
by SAFA Brian
https://www.youtube.com/watch?v=RzhphXgXMcE