David N would have been pretty sure that the boarding would give way if he kicked it, as otherwise he would have possibly broken his foot, or at least hurt it enough to give him some trouble during the match.
But didn’t particularly care about the consequences, probably due to this ‘red mist’ that is being suggested, or maybe because he didn’t consider what might, and did, happen, thinking the flimsy bits of wood would just fly out of harms way.
A stupid error.