he said the guy "representing" or portraying aikido in it weighed like 400 pounds, so there's another type of force field one can have
Umm, no. The person who represented Aikido in the documentary was Sensei Kensho Furuya. He is a very well respected and accomplished Aikido Sensei. 400 pounds is a bit of an exageration, probably closer to 275. But then, does that really matter?