"Dad, d'you think I'll catch a cthulhu?" Father pulled the last cooler out of the trunk. "You can try, but I think you're more likely to catch some trout."

"No, I'll fish in the deepest holes and... can I bait with squid?"

"Maybe when we're not fly fishing, son."

For a couple hours, Father and Son fished up and down the river. The cooler was half full and Father had just cast his fly when his son called out.

"Just a second, son." He watched the drift.

"Dad!"

"What?" He pulled in his line and turned. A tentacle hung from his son's taut line. Following the tentacle down, he looked into a massive face of glistening squid flesh, behind it a distant, many-angled city, all under the unruffled stream.

"Can I keep it?"

Cloaked persons appeared from the woods around them. Translucent grey skin peeked from beneath their hoods. "Ummm, son," Father said, "I think this ought to be catch and release."

Son looked at him, then carefully unhooked the tentacle. It slithered back through the hole in space. For an instant, the alien face looked grateful, and then it and the impossible city vanished, leaving only the pebbly streambed.