The speaker in the example says "Your mind's..." This means "Your mind is..."
"Is" can be contracted to "'s" on the end of a noun:
The refrigerator's broken.
Patty's nineteen now.
But the same form is also used to show that something belongs to a person or thing:
The refrigerator's handle is broken.
Patty's brother goes to my son's school.
English speakers have to figure out which way "'s" is being used based on the situation.