Placentic
If you are placentic, then that means that you live for adrenaline rushes, and thrills. Without them, your life would fall apart.
I was very placentic when I drove around town with police lights pulling people over.
placental gravity
(n.) the force that pulls the baby out of the womb and into the hands of an either irresponsible nurse or eager-to-get-away-from-this-job hospital employee.
The placental gravity was so strong, the baby shot out of its mother and out the window. Luckily, it landed in an empty baby carriage on the street. Damn gravity.