Requested on Discord, sloppily done by me. Hopefully this can be improved.
105^2 + 545^2 = 308,050, square root of which is 555.0225220655464536227447563087190998813352195362313367161...
Thus, the red line is about 555.02 px long
275^2 + 295^2 = 162,650, square root of which is 403.2988966015156357360558457430646866474667814089525284575...
Thus, the green line is about 403.29 px long
Average American woman is allegedly 5'4", or 162.56 centimeters.
0.29288901537729339880186134583849 cm per pixel, going by red line for Mera's height. That, times green line (Distance from duck to edge of screen.) is 118.1192110115086548028026621632 cm.
According to User:Agnaa who requested this calc, with a link to a WEBM, it runs at 25 FPS. Unfortunately, I can't get this to go frame by frame with VLC properly, so I went by his word.
Quoting him: "duck's stationary on frame 2, starts moving on frame 3, is out on frame 8". Thus, 5 to 7 frames. 25 fps means 0.04 seconds per frame so 0.2 to 0.28 seconds.
Wolfram tells me the fastest speed based on this would be about 5.906 meters per second & Google tells me mallards weigh 0.72 to 1.6 kg.
This seems to share the colouration/pattern of a mallard duck; Apparently, it was created by someone, & their creations are often yellow or redish in colour. I think Agnaa can vouch for this.
To keep it simple, I'll just have 3 ends. Lowest speed (4.219 m/s) & mass, average speed (4.922 m/s) & mass, highest speed (5.906 m/s) & mass.
Lowest end (Assume 7 frames, 0.72 kg) 6.408 joules
Average end (Assume 6 frames, 1.16 kg) 14.05 joules
Highest end (Assume 5 frames, 1.6 kg) 27.9 joules
Considering 10-C, Below Average Human is, at maximum, 40 joules, all 3 of these yields are solidly within it.