Devotees generally do not fall down, but if circumstantially they do, the Lord, because of their strong attachment to Him, gives them protection in all circumstances.
The dust of the feet of a devotee, the water that has washed the feet of a devotee and the remnants of food left by a devotee are three very powerful substances.
Association with a pure devotee for even half a moment in this material world is the greatest treasure for human society.
The root cause of devotional service to Lord Krishna is association with advanced devotees. Even when one's dormant love for Krishna awakens, association with devotees is still most essential.