A problem with describing mech movement is that the source material basically shrinks the world so mechs are not just human shaped, but human sized (if humans were not also shrunk), so a walking pace of two 1m strides a second inflates to 60km/h. An actual twelve meter tall mech trying to walk with humanoid motions is basically bouncing along the ground like an Apollo astronaut on the moon. So a 3/5 mech, at a walk, hops about 1.25 meters into the air and covers 10m. Once a humanoid mech gets up to 10 hexes a turn, the foot only comes down once a hex, so a fast mech should be able clear a 30m sinkhole, but putting the foot down too early, or too late, will be disasterous. If myomers are good elastics, mechs should hop about like kangaroos. If a mech can jump as high as 5m, it only comes down every other second, so running long jumps of 30m would be doable for a MAD II and a rediculously fast mech with MASC and a supercharger could leap 150m (while still only rising 5m).
Even an Annihilator moves too quickly to really walk like a human. To actually maintain a good connection to the ground, a mech would have to move like an ostrich: The thigh is kept mostly parallel with the ground, and it pumps the knee up and down, so the center of mass stays at the same level (what looks like a backwards facing knee is actually the ostrich's ankle).
