Scenario 1: You haven't bet yet, but you are in for $100 (the ante). Everyone before you has folded, and it's $600 to you (the big blind). You have $5925 left. Big Blind is the only person who gets to speak after you (Small Blind is on vacation). If you fold, Big Blind automatically gets the pot. Your cards are 5 and 7 and not even the same suit. What do you do?
Scenario 2: You have king and jack (not the same suit) and some idiot has gone all in with a big stack. Everyone else folded. There's no flop yet. Call or fold?