A hovering helicopter can generate winds up to 120 mph ("Rotor Wash"). The wind chill factor may also be significant. https://www.nwmedstar.org/Helicopter-Safety/#hazzards
The house I just bought has a special adaptive powered exercise bike. See that silver shaft moving the white part above? I see some serious potential. Speed can be set for 1-15 mph, and to any desired duration. I am working on a conversion plan.
Energy increases with speed squared. So, e.g., going 80 mph instead of 70 mph will require ~30% (M)ore distance to stop – easily the diff. between a scare and an accident
