Bro? Brachio bomber is an attack that entirely relies on queen's weight
Sending him flying at that distance means that sanji can generate more force than brachio bomber
I don't understand your comparison
Bon clay is heavier than luffy btw, given how he's taller and pretty much has the same physique
Breaking a superhuman's teeth who can tank attacks from Magellan and fight awakened ancient zoans means is way more impressive than destroying a small house
Eh I think there is some technique behind it otherwise Big Mom is really not all that durable because a punch from Pica would generate a lot more force than some dinosaur falling, G3 should generate a lot more force as well.
Maybe Queen is using CoA and added some form of momentum.
But then again Big Moms own durability isn't all that impressive since metal beams can do damage to her