In their infinite wisdom, or rather to prepare for greater ad revenue twitter have started showing inline images in your feed. I follow some questionable people and the last thing I wish to have in on my screen or phone is an obscene picture, amusing as it may be.
Currently, you can turn this off in the App but not on the desktop. Awesome stuff twitter!
If you want to do it in the app, go to “settings” and de-select “image preview”