In the “How To Make an Action Movie Manual” there must be an entire chapter devoted to manholes.
note: Tom Cruise or Bruce Willis must be the air duct/manhole using champion.
double note: Do the workmen climbing down manholes use “manhole coveralls”?
triple note: another great idea from Pat Coakley at Single for a Reason.
quadruple note: This manhole cover photo taken in Karuizawa city, Nagano Japan. It depicts Mt. Asama: a very active volcano.