Tipping Point host Ben Shephard struggled to keep a straight face after contestants gave a string of wrong answers on the show.And fans took to Twitter to share their disdain as they mocked contestants Dom and Linzi too.Dom, a primary school teacher from Manchester, and marketing manager Linzi from Huddersfield had managed to beat off the competition to make the penultimate round.But Ben Shephard had to hold back his laughter after the pair both made a series of hilarious blunders as the pressure of the studio lights took hold of them.When Linzi was asked "in his epic poems, Homer often refers to nectar as the drink of the gods and which other substance as their food?" she was quick to pass the question over to her competitor.Dom was left.