Another Day (Alliteration)

A boy by the bay,
Sings a sad song,
Deciding his day,
Going and gone.

Lays the last
Crate on the crane,
Whistling while
He pushes the pin.

It rocks and rises,
Shakes and shudders,
Twists and trembles,
Sure and steady.

Descending down,
Tiny thump,
Placed perfectly
As always.

Finally finished,
Enjoyment ended,
Wistfully whistling,
He heads for home.