A Hippo is Bounding Around on My Head

A hippo is bounding around on my head.
Gorillas1 are banging on drums.
A rhino2 is charging me full speed ahead
while a crocodile's eyeing my thumbs.
A rattlesnake's winding3 his way up my side.
A tiger is sniffing4 my clothes.
A grizzly5 just grabbed me, his mouth open wide.
A tarantula's perched on my nose.
I'm drowning, surrounded by man-eating sharks.
An elephant sits on my chest.
Yes, that's how it feels when the teacher remarks,