Fair call on the gimbaling at the end, in that instance it does impart a moment around the CoM and will invoke a torque, though that&#x27;s really only at the end once much of the vertical velocity is cancelled. As a result it does represent the inverted pendulum right before landing.<p>Interestingly, because the CoM is so low due to the low volume of fuel by the time of landing, it&#x27;s likely not as big a torque as you&#x27;d first expect (all the mass is down the base where the engines are). In that case, rocket height isn&#x27;t going to have as a big an impact because it&#x27;s not like it&#x27;s equally dense up the entire rocket structure. I&#x27;d argue he&#x27;s likely overstating the effect of rocket size on how difficult it is to achieve.