If Buzz actually thought he was the real Buzz Lightyear, why did he freeze up like the other toys when humans were around?
Natural instinct for a toy.
Doing it controlled is probably a learned trait like how babies learn to shit on demand.
Because We have a story to tell and its a fucking kids movie
>>85253622
because he believed himself to be trapped on a planet full of giant's and adapted to what other survivor's did until he returned to his home planet.
The magic curse of toys that can move and talk when no-one is looking. Some are aware of it. Others like Buzz are completely oblivious and have no idea they freeze up when humans are around.