Turnabout is fair play: Something the aliens consider utterly mundane and/or harmless, that is dangerous or terrifying to humans.
It was a disaster. The freshly-introduced Ambassador Harry still hunkered in her improvised bunker of relatively solid furniture, butter knife held tight to her chest in a white-knuckled grip. The ability to speak had left her and she would slash or stab at anyone who came close.
Until Sui'dut came to sort out the mess. Sui'dut, the only alien Harry trusted on an instinctive level. With quiet words and caution, she talked the Ambassador down.
“It’s all right,” soothed the Chelete. “Ambassador Vrix was just yawning. It’s near his hibernation time.”
“Well ‘e can 'ibernate far off'a me, f'r all I cares,” muttered Harry.
It took some hours to sort out, but humans evidently have a pathological fear of wide maws with multiple rows of mobile teeth.
[Muse food remaining: 62. Submit a prompt! Ask a question! Buy my stories!]