I think all irrational things like that count as normal 2yo behavior. I mean, this is the age when it's okay for them to fear being sucked down the bathtub drain.
Does it have strings he can pull and maybe get used to it. Or the oscillating ones like he could talk into and make funny sounds? Or throw balloons at them to see them get blown back?
SAHM to Magnolia May (09/10), Luke Russett (04/13) and expecting 11/16. Wife and best friend to my airman.