Turning on animation in box trigger

Hello, everyone. Please, sorry for my poor english. I have a problem in knowledge. So I have a character, which goes on a stair and slips.

So in UE language, I have walk animation, slip animation and box trigger on the stair. When my character accross box trigger, I don’t know how to change animation to slip. I learned how to set up simulation ragdoll.

In entire words, I want to change animation and turn on simulation ragdoll. If I passed resolved question or tutor in UE youtube which resolve my task, please sorry for flood, and take me a link. I will be glad to your help.