This Is an Experimental Video: What Happened When a Curious Mouse Faced a Venomous Black Widow In this experimental setup, a small mouse cautiously approaches a venomous black widow spider, unaware that danger can come from something so small and silent. The mouse relies on curiosity and quick reflexes, while the black widow stands firm, raising its legs in warning and trusting its powerful venom for defense. Every second is tense, showing how size means nothing when venom and instinct take cont