One of the great advantages of the RocketDave pose is that it can be performed anywhere, due to its compact nature. Thus, it is not restricted to locations with large surface areas, like the Conch and some other strategies are.
This provides Dave with the opportunity to perch his Rocket-self on a great vantage point. This makes Dave's dream of being a Rocket even more real. His physical form is like a Rocket, and he also feels like he is up in the air like a Rocket.