The soft noise of the engine surprised her initially, making her almost drop the sponge-- until Naomi, listening closely, realized what it was (and had to fight hard not to laugh). The sound put her in mind of a large, lazy cat, but hearing it from an Autobot was something else. It was adorable, and the only reason why she didn't voice this to Jolt was because she knew he wouldn't exactly find that a good thing.

Of course, that didn't stop her from inquiring innocently, "So it feels good, then?"