Re: "Aikido is BS"
A fair question. I'm only about 5'8" but I'm fairly solidly constructed so have gotten the "brute force assertion" more than once. (And size does matter, no matter what they say, uhm)
But a fairly simple thing is to have a simple hands on shoulder connection, remove their connection to the ground in the subtlest way your skill allows, such that they stagger and have to take a step. You can say, "That thar is Aiki!". The same thing gets applied in locks, throws and strikes, yippee. (For the judo purists it's the subtler setup to kuzushi than more observable timing and pressure set ups)