How'd they do that?

[NutmegCT]

To keep the brain from idling ... why doesn't it fall over?

 

[Mickey Richaud]

An album by the Moody Blues comes to mind...

 

[Steve]

Gyroscope.....

 

[Hot Wings]

Gyrostat. Monorail designed by Louis Brennan. The concept has been making a bit of a comeback for vehicles such as this:

https://www.youtube.com/watch?v=kPyIwY2hJ_A

 

[Gliderman8]

Gyroscope.....

That may be Steve, but I'm guessing each individual had an assigned place to stand to get everything into balance

 

[Keith_M]

That would have to be a really big gyroscope (or several smaller ones). What powers the gyroscope(s)?

 

[BustedKnuckles]

That would have to be a really big gyroscope (or several smaller ones). What powers the gyroscope(s)

From Wiki... https://en.wikipedia.org/wiki/Gyro_monorail

 

[Boink]

Arms are flapped. They just happened to snap this photo at the split second of arms all down... except for that guy waiving the peace sign.