Pygame Sound/Font/Delay seems to be out of order

Question

I'm making a Snake type game using Pygame. Everything's pretty much working, but below is the end of my game. There's a sound effect, and I put in the delay so the window didn't close before the sound finished playing. It all worked fine, and I just added in the Game Over text. For some reason, the sound plays, the game pauses, and then the Game Over quickly flashes on the screen. Can anyone explain to me why this is going out of order?

I'm using Python 2.7 on Mac 10.6.8.

if w.crashed or w.x<=0 or w.x >= width - 1 or w.y<=0 or w.y >= height -1:
    gameover.play()
    font = pygame.font.Font(None, 80)
    end_game = font.render("Game Over!", True, (255, 0, 0), (0,0,0))
    endRect = end_game.get_rect(centerx = width/2, centery = height / 2)
    screen.blit(end_game, endRect)
    pygame.time.delay(3500)
    running = False

Answer 1

Could it be that you are missing pygame.display.flip() or display.update(rectangle=endRect) right after the screen.blit() call ?