Does anybody watch MMA footage and notice any kata applications within the battles? or street fight videos?

Does anybody have personal experience or has seen an application used in real life?

A friend, training partner, and law enforcement official I know has stated that when detaining somebody he has used an application from kata...without realizing it till later.

Examples maybe Lyoto Machida doing the famous jump front kick to Randy Couture, or in many MMA fights you see clinching and term under/over hooks get used frequently. I sort of figured the under/over hooks while clinching was basically chudan, gedan, jodan uke positions/variations.

Just curious.
May the force be with you.