triggering a character animation on collision...?

've been looking for weeks for a simple script to trigger an animation on the player using collision but can't seem to find any info. Does anyone have a simple script for this they might be willing to share? 

I didn't find the right solution from the internet.

References:

https://forum.unity.com/threads/triggering-a-character-animation-on-collision.493161/ 

Marketing campaign examples

Серёга, давай по русски пиши, шо ты гониш.

https://3ddd.ru/forum/thread/show/getting_new_skills#post1141634