A sample conversation at work today

We're drilling piers for an HEB expansion downtown San Antonio.
The specs call for 22' deep in fill. 18' in broken rock or 3' into any bedrock we find above that.

Me (on my perch on the drill rig)- I hit rock, but it's not very hard."

Terracon QC guy-  "How hard is it?"
Me- "not George Thorogood hard."

Terracon-"More like Michael Bolton?"
Me- "More like the Bangles."

Terracon- "Ok, that'll work, go another three feet."