1. Place upturned wastebin on sitting cat. Check reaction. Pic. 1.
2. Remove wastebin. Check reaction. Pic. 2.
3. Replace wastebin. Check reaction. Pic. 3.
4. Remove wastebin. Check reaction. Pic. 4.



Pic. 1-3

Pic. 4
Conclusion - no reaction; cat couldn't give a monkey's. QED.