I know it's not a cartoon... but, yeah, it's worth a shot!

The happiest memory I can remember...? [She shuts her eyes and thinks.] The first time I fused with my best friend, Steven Universe, and we became Stevonnie. [That probably makes absolutely no sense to anyone but her and people from her world, but... she thinks long and hard about that memory. Dancing with Steven on the beach, the feeling of fusion, the fun she had just being Stevonnie. It causes her to be surrounded by a white glow.

But, as for the engine, it does... absolutely nothing. When Connie opens her eyes again, the engine is still stalled.]

Aww...