The man is Parjanya (the deity of rain); the horse is Agni, (deity of fire). The bull which you saw on the road is the Airavata, the king of elephants.
यः पुरुषः स पर्जन्यो योऽश्वः सोऽग्निर्य ऋषभस्त्वया पथि गच्छता दृष्टः स ऐरावतो नागराट्॥