I just have some questions about the rules of UNO, since me and my cousins are relatively new to it.
Assuming we're only 2 players left, and I already placed my last card (Example, a +4 Card), but then my opponent also played a +4 on top of my +4 card, is it invalid? Or do I get to draw 8 cards?
When I play a +4 card, can I immediately place another card on it? (Example, I played a +4, then called out YELLOW, then placed a yellow "5" on top of the +4 without shifting my turn)
Also the same question as #2, but if I get to place a "Skip/Stop" card on top of my +4, will that pass the +4 effect to the next player? (Example, I placed a +4 then a skip on top of it. The +4 is dedicated to Player B. By putting a stop, the +4 gets passed to Player C instead.)