ex 2: It doesn't make sense

[Author's note:]
I really have no time to continue the main story, so here is a second extra. 

Warning: This extra has a little harsh language. 

[unmarked:] story
[marked:] author's note

[extra 2:] 
Chapter 14: Finding the Russian Civilisation 

I turned to Gaku, raising an eyebrow. “By the way, how did you even resist the law of inertia earlier? Everyone else was nearly flattened against their seats.”
Gaku smirked, clearly proud of himself. “It’s actually simple,” he began, as if what he was about to say wouldn’t go completely over my head. “I’m a professional physicist. To counteract the forces, you need perfect balance. With my weight—68kg—I positioned my feet in an L shape, exactly 90 degrees, with a 30-centimeter distance between them. Then I maintained a slightly 80-degree bow to align with the gravitational pull. Holding onto the chair provided extra stabilization. That’s how I resisted the pull of the speed.”
I stared at him, dumbfounded. “You're Bullshittin' aren't you?”
Gaku chuckled at my response. “Yes.” (Yes)

[End extra 2]