After the sinking, he was seen again, clinging to a broken deck chair in the freezing water, using a loud whistle to call the boats.

Several loud whistle blasts from the referee indicated that the swimmers were being scolded because they were drafting off each other.

Throughout the makeover, the presenter keeps time with a stopwatch and marks breaks in the task with a loud whistle.

Smiling, he acknowledged the applause — marred by a couple of loud whistles — by touching his heart and joining the palms of his hands in gratitude.

Now nuthatches are also beginning to make loud whistles and trills.