Give these vids a view:
* [https://www.youtube.com/watch?v=iLALpD004Gk|The Design Flaw Behind MacBook Pro’s “Stage light” Effect!]
* [https://www.youtube.com/watch?v=aihRru-lCns|MacBook Pro Flexgate Follow Up! Has Apple Addressed The Issue?]
The bottomline here is how far you bend the display back. Try not to extend it beyond 90 degrees back as the farther you bend it back will stress the cable.
You also have a second issue which is the keyboard I would recommend getting a keyboard skin to help protect it.