Tom Pope's late penalty secured Port Vale a 1-0 win at struggling Stevenage after Boro boss Graham Westley was forced to run to the match amid heavy traffic.
Westley is said to have left his car in Welwyn - approximately five miles on foot from the Lamex Stadium - but his pre-match jog went unrewarded thanks to Pope's spot-kick.
The defeat leaves Westley's side bottom with just two wins from 26 Sky Bet League Two matches.
Stevenage goalkeeper Paul Farman pulled off a string of fine saves to keep the hosts in the game, denying David Worrall twice in the opening eight minutes.
At the other end, Vale stopper Scott Brown produced a super stop to keep out Kurtis Guthrie, before denying Terence Vancooten's long-range strike.
Vancooten squandered a great chance after the break when he failed to convert a free header, while Farman did well to keep out Tom Conlon's free-kick.
With just two minutes to go, Conlon was hauled down inside the box and Pope sparked jubilant scenes among the visiting fans as he made no mistake from 12 yards.