Pace has recently added “kisses” to his bag of tricks. When you say “kisses” or make a lip smacking kissing noise, he'll do the same thing.
That's pretty cool in and of itself but the other night, he was sleeping on the couch between Shea and I. I leaned over him to give Shea a kiss goodnight as I was off to bed. From between us, we hear “Smmmacck!” as Pace, still asleep, must've heard me kissing Shea and decided to make the noise himself from wherever he was in dreamland!