Lucid blast in the elevator lobby

Gonna be a rough night. First dream, a half-black girl is standing very close to me, face to face, introducing herself, with some totally bogus name starting with an E. Some kind of barebones building's elevator lobby. As soon as I realized how impossible the name was, I realized I was dreaming, but quickly drifted awake (temporarily paralyzed for 15 seconds or so... yuck). Accompanied with the shock out of sleep was some kind of quick, crescendoing mechanical hum. May have just been in my left ear.