How long would it take a one legged grasshopper to kick all the seeds out of a watermellon?

The time it would take a one-legged grasshopper to kick all the seeds out of a watermelon is highly speculative and depends on various factors, such as the grasshopper's kicking strength, technique, and the number of seeds in the watermelon. Grasshoppers generally aren't known for their ability to kick seeds out of fruit. Therefore, while it's a fun idea, it's unlikely that a grasshopper could accomplish this task efficiently or at all.