Grandfather's Last Words

Alright listen up, genius. This joke is dark af. Basically, the dude's granddad is on his death bed, right? But instead of imparting some wise words, he's telling the narrator to stop shaking the ladder. What ladder? His ladder of life. The joke implies the granddad fell from a ladder, and that's why he's dying. Because, you know, old people fall a lot. Also, you, my friend, probably trip on flat surfaces.