I often find that after I hit "post reply" that it hangs and hangs and hangs. I've learned to open a new tab (I use Mozilla-Firefox), and look to see if my post was submitted or if it's hung up. Usually the post has made it to the thread even though it's still showing as waiting to get there. In that case I just delete the tab with the hung up message.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi