Petr J. performed 12 back flip-knee-front flip somersault tricks on a trampoline.
Petr J. performed 34 "back flip to knees" somersaults on a trampoline.
William C. completed 16 alternate lunges in one minute while holding two 22.5-kilogram dumbbells.
Alicia Weber performed 151 arms crossed bent knee sit-ups in three minutes.
Suresh G. knelt for one minute, 3.01 seconds while holding both of his heels.
Saar K. balanced a tennis racquet vertically on his knee for 2.65.
Suresh G. bent his knee for seven minutes, 17.03 seconds while holding his foot with one hand.
Suresh G. held a forehead-to-knee pose for 40.66 seconds while standing on one leg.
Shubham P. walked in a circle on his knees in 2.06 seconds while holding a lotus pose.
Molly F. performed 38 knee skips on a trampoline.
Suresh G. balanced on his knees for three minutes, 22.21 seconds while holding a lotus pose.
Suresh G. balanced a lightweight cricket ball on his knee for one minute, 26.73 seconds while standing on one foot.
Kevin Taylor's martial arts student, Keegan O'Keefe, completed 120 knee smashes in one minute.
Alicia Weber performed 230 arms crossed bent knee situps in five minutes.
Doug McManaman balanced a golf ball on a spoon held in his mouth for one minute, 40.01 seconds while balancing a golf ball on top of a water bottle on his knee and balancing a lacrosse stick on his thumb.
Ahmad Amin Bodla performed 71 martial arts knee strikes in 30 seconds, targeting a dummy.
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