Psychologically it would indicate Disha 'killing' off her old feeling for Indy and due to a misunderstanding (where would we be without these!) injuring Rano.
If it is not the above and it is not a dream then the actors in TD had better started leaving for greener pastures because the only experience they are going to get out of TD is that they will either be shot or go to prison !!
If the writers needed Chavvi out of the picture so she could go to her honeymoon then a very adequate excuse was to send her on a thir yatra - she did promise all those things to Bappa for Sum to get better!!