Audio problem: When Mashkov's men grab Steve, you can hear him say "Come on, Charlie", but his lips aren't moving at all. (01:39:35)
Audio problem: When Skinny Pete warns Charlie over the phone, he says "mother freaking", which is a clear dub over. (01:15:30)
Answer: Actually, it almost certainly is to pay for Stella's meal. It's a point of principle - they don't owe Steve anything, so they won't even let him pay for the meal that she ate. He's the one who owes them, big time - paying for the meal makes the point that there's no debt of any kind going the other way.
Tailkinker ★