Shrink and Grow Phenomena at Genuine Vortexes

I will pay $1000 to anyone who can PROVE OR DISPROVE this "shrink and grow" effect; OR who can prove any trickery in these photos.

At the Montana Vortex

Two people demonstrating the shrink and grow height change phenomenon at the Montana Vortex

At Mystery Hill, North Carolina

The demonstration platform at Mystery Hill, North Carolina

The demonstration platform.

Side-by-side comparison showing height change at Mystery Hill, North Carolina

Girl and boy swapping positions to demonstrate the shrink and grow effect at Mystery Hill

At the Oregon Vortex

Shrink and grow height change demonstration at the Oregon Vortex

At Mystery Hill, Michigan

Shrink and grow demonstration at Mystery Hill, Michigan

Close-up of height change effect at Mystery Hill, Michigan

More shrink and grow photos.