“ What if casting magic changed (for a few hours or days depending on the strength of the spell) the colour of the skin of the spellcaster? It could lead sadly to a very racist world to rp in.”
“ The Chinese, when attacking a castle or fort, flew kites over the city wall and used the length of string it took to get it there as a measurement to know how far they had to dig a tunnel to get under the wall.”
“ The party comes across a nice hermit in the woods. He gives them food and lodging for the night. They awaken to his terrified screams. 'East! It's east! Stop it! It'll kill us all!' The poor horror-stricken hermit dies thrashing in agony, one boney arm outstretched, his finger pointing to the east.”