A large piece of hound rope usually found down a thin back alley, ginnel or snicket, where one has to manoeuvre over it like its an obstacle.
Bloody hell Jeeves, walking down the back alley to yours I was confronted by a rather large logstacle which was a bugger to leap over. It almost tripped me up
When two God-like forces combine into one causing a massive explosions at the micro-cellular level thus creating one of the largest explosions Azeroth has ever seen, leaving gaping craters, extinct species, and the deaths of many horde in its wake, you have a Locustaire upon you.