When Nick arrives at the Cathedral, he steps out of the vehicle and walks to the building. The vehicle departs. Inside the Cathedral he suddenly is in a wheelchair, which appears out of nowhere.
Nicky who is a descendant of the Romanovs has hemophilia. However the only two Romanovs who carried hemophilia were Czarina Alexandra and her sister Grand Duchess Elisabeth. Elisabeth never had children and none of Czarina Alexandras children survived the Russian Revolution.