Otho excused himself to the Emperor [Galba], saying that he had arranged to view a house that was for sale; then slipped out of the Palace by a back door and hurried to the rendezvous. ... At all events he hastily got into a closed sedan-chair of the sort used by women, and headed for the Camp, but jumped out, and began to run when the bearers' pace flagged. As he paused to lace a shoe, his companions hoisted him on their shoulders and acclaimed him Emperor.
And that's all he needed to become the leader of the Roman Empire. A quick hoisting by his friends, a little murder later, and then BAM! he was the emperor. Just like that.
For all of about three months, that is.
Damn! Ruling's hard!