There is a gesture to close the post. You pull it down... instead of refreshing/reloading it closes the post... which in my opinion is just wrong (I really wanna say dumb). Also, no way to reload the comments!!

Also, if you open a post from user's page, you can use the usual iOS back gesture which funnily is not applicable to go back from the user's page for some reason and you have to use the back button!

These interactions should be consistent... changing action of well known gestures to be 'different' is not very smart move IMO....