Love it. I can just imagine that conversation ending in that manner : ).
I was making an assumption that you laid concrete floors on the ground (before tiling). You get these ground concrete slabs in warehouses and large out of town supermarkets etc. Believe it or not, it is a speciality. Some engineers don't know that and try to dabble in this design with sometimes horrendous results (cracking and subsidence). Now imagine putting trucks on them and then increase the loads to large helicopters. I hope you get the picture.