Corrected entry: In the scene where the grandfather is attacked, the entire house is demolished into complete rubble. A few scenes later, the grandson is seen walking around in the second floor and walking through parts of the house.
Sammo
29th Mar 2009
Correction: If you look at the house while it is being destroyed the back half is still standing so it is possible for Goku to walk around the back half.
japon68
I think the correction is valid, since the entry is wrong saying "the whole house", no doubt. I do think that the part that is destroyed, compared to what is shown 'exploding' with Piccolo's force choke on steroids, is too small ultimately, but we do see that the central part of the destroyed section does not go all limp like the rest, so, in doubt, I guess it can be possible. It's not a huge and obvious mistake at least.
Sammo ★