"Whats this do?" Asked the visting Human.
"That," Dugfar replied. "Is my- Wait! Don’t tou-"
...and with that they were buried alive.
The proud dwarven Captain Dugfar stood atop his mighty machine of magic and stone looking down the mountain they had just emerged from; letting the wind whip his beard over his shoulder… "This is a proud day for the Dwarves!" He bellowed. "...and this is just the start!"
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.