Banta Singh finished his English exam and came out. His friends asked him how he had fared. He replied, "Exam was okay, except for the past tense of 'think'. I thought, thought, thought and at last, I wrote 'thunk'
Santa Singh : 'Look Banta, what type of glasses they have made. The top is closed. How can you fill lassi in it ?' Banta Singh : 'Yes, that's funny. And even if you make a hole at the top, how will the lassi stay in the glass when the bottom is open?'