a onepointsevenmoose conversion
about 0.22 seconds for an arrow from a 50-lb compound bow to reach that height
1 black hawk helicopter: arrow launched straight up at 300 fps (91.44 m/s), no air drag; unreachable above ~426 m → 0.2213
8¼ adult bull moose — please respect the elevator's posted capacity
* not a typo — the plural of moose is moose
1 black hawk helicopter = 20 m ÷ 2.4 m per adult bull moose = 8.333 → 8¼
69 Barbie dolls standing on each other's shoulders
1 black hawk helicopter = 20 m ÷ 0.29 m per Barbie doll = 68.97 → 69
67 Buzz Lightyears standing on each other's shoulders
1 black hawk helicopter = 20 m ÷ 0.3 m per Buzz Lightyear = 66.67 → 67
20 unicycles standing on each other's shoulders
1 black hawk helicopter = 20 m ÷ 1 m per unicycle = 20 → 20