In making such a request, Jesus is claiming to be king. He is speaking as one in authority. He is stating that as king he has rights to any possessions of his subjects. It could be that God wants to mount your donkey and enter the walls of another city, another nation, another heart. That guy who gave Jesus the donkey is just one in a long line of folks who gave little things to a big God.
Scripture has quite a gallery of donkey-givers.
In fact, heaven may have a shrine to honor God s uncommon use of the common. It s a place you won t want to miss. Stroll through and see Rahab s rope, Paul s bucket, David s sling, and Samson s jawbone. Wrap your hand around the staff which split the sea and smote the rock. Sniff the ointment which soothed Jesus skin and lifted his heart.