Why does segismund behave so badly during his first time at court?

We need to consider that Segismund had spent a lot of time enclosed in the tower as a prisoner and he is freed because the country is at the middle of a civil war and the people want to crown their rightful king, so he is freed. Having mentioned this, when he is for the first time at the court he is simply overwhelmed with his freedom and all the sensorial new feelings he is going through.  

that’s the kind of bug henry was; and if we’d a had him along ’stead of our kings, he’d a fooled that town a heap worse than ourn done.”

each morning i wrote my name

on the dusty cabinet, then crossed

the dining table in script, scrawled

in capitals on the backs of chairs,

practicing signatures like scales

while mother followed squirting

linseed from a burping can