We had a Tristar doing demo's in South America. At Lima. Peru one day...(high and hot), one takeoff almost didn't take off!
The various speeds, V1; can't stop now, Vr; rotate, V2; liftoff were computed for about 50 people.
When the pilot looked back into the cabin, he saw close to 200 people! Marketing had invited everyone in the terminal to take the flight!
Something like a Shorts 330 with that no-chord wing... It must be a bear when the weight shifts!