Number 22:26 Then the angel of the Lord moved on ahead and stood in a narrow place where there was no room to turn, either to the right or to the left.
Balaam was trying to do things the way he wanted to; but God had other ideas and knew the only way to get through to him would be by extraordinary measures.
God chose the donkey to receive the message because Balaam was not listening to the instructions God gave him.
God also chose the exact place to get the message across by making sure Balaam would not be able to go anywhere else!
Don’t be surprised if God picks the most inopportune moment to give you a message!