Palm Sunday Questions

I think there are always (or almost always) gaps in biblical stories. Today I was reading Matthew 21:1-11. This is the entry into Jerusalem. Some questions came to mind:

• Jesus sends two disciples into Jerusalem to find a donkey and a colt. Do the disciples question this? It seems like previously they would question everything. "What do you mean we'll find a donkey and a colt tied to something? Where? Tied to what? Why do you need them? Will we be arrested for stealing them? Did they ask these questions? Or did they just silently go into the city?
• Were they surprised to find the animals? Or did they just think, "That Jesus, he knows what he's talking about!"
• Did anyone question that they were taking them? "Hey stop, those aren't yours!"
• Whose animals were they? And why would the owner be satisfied with "The Lord needs them."? Are we missing an angelic visitation to an animal owner?
• The crowds greet him as a conquering hero. What happened to that attitude during the week? Later they are shouting to "crucify him." Same people? A different crowd?
• Did the people know that the prophet they speak of is more than a prophet - he is the Messiah? Do any of them believe it?