Babaji had a twisted sense of humor. Incidents of this happened when he told a devotee to go ahead and jump off a cliff if he wanted to. When he branded one of his chelas (To help him rid himself of karma then he healed him.)and when he told Sri Yukteswar that his restless thoughts kept him from staying around him. Sardonic is often defined with words that are even harder to understand than sardonic itself, it basically just means someone who has a twisted sense of humor, that appears to enjoy misfortune but is really just commenting on it.
As I passed beyond the site of the large banyan tree near the river bank, a strong impulse urged me to look back. There, under the shade of the banyan, and surrounded by a few disciples, sat the great Babaji!
"'Greetings, Swamiji!' The beautiful voice of the master rang out to assure me I was not dreaming. 'I see you have successfully completed your book. As I promised, I am here to thank you.'
"With a fast-beating heart, I prostrated myself fully at his feet. 'Param-guruji,' I said imploringly, 'will you and your chelas not honor my near-by home with your presence?'
"The supreme guru smilingly declined. 'No, child,' he said, 'we are people who like the shelter of trees; this spot is quite comfortable.'
"'Please tarry awhile, Master.' I gazed entreatingly at him. 'I shall be back at once with some special sweetmeats.'
"When I returned in a few minutes with a dish of delicacies, lo! the lordly banyan no longer sheltered the celestial troupe. I searched all around the ghat, but in my heart I knew the little band had already fled on etheric wings.
"I was deeply hurt. 'Even if we meet again, I would not care to talk to him,' I assured myself. 'He was unkind to leave me so suddenly.' This was a wrath of love, of course, and nothing more.
"A few months later I visited Lahiri Mahasaya in Benares. As I entered his little parlor, my guru smiled in greeting.
"'Welcome, Yukteswar,' he said. 'Did you just meet Babaji at the threshold of my room?'
"'Why, no,' I answered in surprise.
"'Come here.' Lahiri Mahasaya touched me gently on the forehead; at once I beheld, near the door, the form of Babaji, blooming like a perfect lotus.
"I remembered my old hurt, and did not bow. Lahiri Mahasaya looked at me in astonishment.
"The divine guru gazed at me with fathomless eyes. 'You are annoyed with me.'
"'Sir, why shouldn't I be?' I answered. 'Out of the air you came with your magic group, and into the thin air you vanished.'
"'I told you I would see you, but didn't say how long I would remain.' Babaji laughed softly. 'You were full of excitement. I assure you that I was fairly extinguished in the ether by the gust of your restlessness.'
"I was instantly satisfied by this unflattering explanation. I knelt at his feet; the supreme guru patted me kindly on the shoulder.
"'Child, you must meditate more,' he said. 'Your gaze is not yet faultless you could not see me hiding behind the sunlight.' With these words in the voice of a celestial flute, Babaji disappeared into the hidden radiance.