First and foremost, it is very short lasting. My expeience:
Giggly
euphoric
ringing/distored noises (beats in songs sound like they echo)
hallucinations can occur (usually trails, or things may have a breathing effect)

Erowid:
giggling
euphoria, exhilaration
sound distortion
dream-like state
minor to strong hallucinations & visualizations
reduction of external stimuli
clumsiness, loss of dexterity, loss of balance
analgesia
'buzzing' sensation in perhipheral nerves