There a couple of moments in the Mahabharata, when it entwines with the Ramayana, another great Hindu epic.
An old and tired Hanuman, the strongest Vanara in the Ramayana, had no strength to move his tail, which blocked the path of Bhima his younger half-brother, the strongest of the Pandavas, in the forest. Bhima thought that using his full strength he could just lift the tail of this monkey and send him to Yama. Unable to move the tail even by an inch, Bhima was alarmed. Humbled by this experience, Bhima asks the real identity of the monkey. Hanuman revealed his true self to Bhima, both being the sons of Lord Vayu.
The backdrop of the forest interlinks with the intrigue of the moment when the brothers met.