JD(U) leaders and Union ministers Nitish Kumar and Sharad Yadav violated the model code on Sunday by hopping onto party colleague and state Energy Minister Lalchand Mahato’s beacon-fitted car at the Ranchi airport to reach Jaipal Singh stadium, for a rally. ‘‘We didn’t do it deliberately and as such should be excused,’’ Nitish later said. Hours later, a dais at Gandhi Maidan in Gaya collapsed as Nitish stepped on it to address the ‘Dalit Chetna’ rally. The stage fell flat as a large number of party workers trooped after their leaders onto it. The leaders escaped unhurt.