Boruc had to move sharply to turn around a Jose Goncalves header as half-time approached then Caldwell was called into action to prevent an Andrew Driver shot from crossingthe line after the Polish keeper had palmed the ball goal-bound.
The quality of a car driver's eyesight was the most likely cause of a crash at a level crossing in which three people died, according to investigators.
The 47-year-old car driver, from Grimsby, was confirmed dead at the scene of the automated half-barrier crossing on Woad Lane, while the other, a 40-year-old man from Cleethorpes, died on the way to hospital, BTP said.