No Parking

This particular Wizard worked in a modern factory. Everything was satisfactory except that certain miscreants took advantage of his good nature, and would steal his parking spot. This continued until he put up the following effective sign: This parking space belongs to the Wizard.... Violators will be toad!

Yo Mama - Witch

Yo mama so fat, if she was a witch, her broomstick would be a broomtree!

Crossword

My girlfriend passed me the crossword to see if I could fill in the last two answers. The first clue "The force on an object due to gravity" and the second "The salt waters that cover the greater part of the Earth's surface"
Can I finish it? Weight and sea.