Empty Adirondacks

It’s time once again for Cyranny’s #1MinuteFiction Challenge. Today’s prompt is the image below.

The waiter came out with two Fuzzy Navels perched on his tray. His two customers’ Adirondack chairs were empty. He glanced around for the elderly couple to no avail. Their beach gear was gone too.

Where’d they go? he mused. This is the third time today I’ve lost (literally!) my customers.

Thinking they may have fallen in the lake, the waiter set his tray down and peered into the water. Nothing.

What the hell is going on? An alien abduc—