Hydraulic stilts - GIF

Hydraulic stilts.

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Previously:

Banna tripe members using stilts to protect themselves from poisonous snakes - GIF
Flipping up a dropped drywall knife on stilts - GIF
Jumping over a motorcycle on jumping stilts - GIF
Man stands on stilts on ladder - GIF
Tractor stilts - photo

Pneumatic...

Air is technically a fluid...

Yes, you are right, it is pneumatic...