Wet noodle time, I hope not anyway. I don't know what you were holding up with that bottle jack on top of the concrete block. If it was anything that could conk you on the noggin, you were asking for trouble. Blocks have very little strength in that direction - sideways, with the load on the web. The block should be up as if you were building a wall, that way the web is in compression, where it is strong, and not tension which is what happens when the block is sideways. Concrete is not strong in tension and should never be loaded in tension. Also, best practice is to have something resilient - like a piece of 2x10 - between the block and the jack so that the load is transferred evenly to the block insted of potentially having the load concentrated in one spot from the base of the jack. Concrete also does not like point loads, which is why star drills work.
OK, nagging mode off.