No martial controller?

[ve4grm]

Personally, I find the 1st less plausible because grabbing and holding someone in place is accomplished by forcing them to carry you

Also, that's only the most basic type of grapple. Throw in nerve pinches and pressure points, plus leverage ala Akido, and a 100-pound person in real life can potentially take down a huge bodybuilder. Add some fantasy physics, and I think we're good.