So while you are respawning (30 sec countdown) and you hit(again) "Respawn" before the 30 seconds are over, the timers will overlap. When the timers(# of times you hit the respawn button) are over your screen will stay in "Please wait" black screen. You can hit escape to see the world and move around, but the menu will be on your screen.
I know its not a huge game breaking issue and people just don't spam the "Respawn" button out of rage, but a fix would be nice ;)