Late actor Irrfan Khan used to scribble notes on the walls of his home. This was revealed by his elder son Babil on Instagram."When you zoom in to notice what39s written on the wall behind me, Baba wrote notes on my walls when I left for London, I guess he still liked drawing on the walls, I guess the child was still alive, which brings me great joy, and yes he spelt 'opinion39 with an 'E39, I am obviously biased here cause I think that39s kind of ducking awesome and also I spelt that with a 'D39 on purpose before autocorrect decides that profane language must not be spoken."Plus I like ducks, there39s a secret joke in that, see if u can find it. And no I39m not sad in the picture, I smoked a spliff, deal with it. I39m 22. I gotta live a little," Babil shared, with a picture of his scribbled wall.He also shared a picture where father and son are planting a sapling.Irrfan died in Mumbai on April 29.