Woke this morning to find my male l144 cave on the top of a "hump" , suspended in mid air. I put cucumber outside his cave when he was on eggs a couple of weeks ago, and the female grazes on this. The spoon I use was buried, cucumber gone, and a 2 inch x 6 inch trench was there. Is this normal behavier, courting behaviour or not normal?

I have no idea what you are asking here?

Better take some pictures and post them, cos reading your description of the phenomenon does give a hint.