We always seen the 11th doctor wearing a bow tie in a coat through series 5-7a
then in a purple coat in series 7
But the Time Of The Doctor The Doctor is about to regenerate but before he does, he takes of his bow tie
Then after changing he looks like this:
Which made me confused - why did the 11th doctor take off his bow tie right when he was about to regenerate? Did he think he would look ridiculous in his next form?