" For 10 points, name this possibly insane predecessor to Claudius and successor of Tiberius who apocryphally planned to make his horse Incitatus a priest and consul.
The soothsayer Thrasyllus claimed that this man had "no more chance of becoming an emperor than riding a horse across the Bay of Baiae," after which this man built a pontoon bridge in order to accomplish that feat. He allegedly prostituted his sisters Drusilla and Agrippina the Younger. His habit of marching in a soldier's uniform as a child led to his nickname of "little boots." For 10 points, name this possibly insane predecessor to Claudius and successor of Tiberius who apocryphally planned to make his horse Incitatus a priest and consul.
The soothsayer Thrasyllus claimed that this man had "no more chance of becoming an emperor than riding a horse across the Bay of Baiae," after which this man built a pontoon bridge in order to accomplish that feat.
Caligula [or Gaius Julius Caesar Augustus Germanicus]