Small spiders don’t jump using muscles. Instead, they control the blood pressure in their legs like a hydraulic system to propel them upwards. – WTF Fun Facts
Source: https://asknature.org/strategy/leg-uses-hydraulics-and-muscle-flex/
WTF Fun Fact – Spider Hydraulics
thank you peter
Same with a penis. Now all I picture is a spider with eight walking dicks for legs.