the what in the ceiling above you?

Core-drills -- that's what it sounds like at least, from my previous experience with them -- it's when they need to drill down through a big ol' concrete floor and leave room for a conduit or something to go through. It does leave a funny "core" of concrete afterward, though. We used to use them for doorstops.

did you try calling me at some point from a restricted number and not leave a message, it would have been friday?

Nope, tweren't me!