hysterical

amusing, diverting, entertaining

clownish, knockabout, slapstick, slapsticky, zany

facetious, flip, flippant, pert, smart, smart-aleck, smart-alecky, snickery

jocular, playful, waggish

campy, jokey (also joky)

priceless, rich, whimsical, witty, wry

blithesome, gleeful, jocose, jocund, jolly, jovial, laughing, mad, merry, mirthful

alarmed, anxious, disquieted, disturbed, nervous, perturbed, tense, troubled, upset, worried, wrought (up)

affrighted, aghast, alarmed, fearful, frightened, horrified, scared, spooked, terrified, terrorized

ballistic, berserk, crazed, demented, deranged, mad, maniacal (also maniac), nuclear

raging, ranting, raving

chicken, fainthearted, fearsome, shrinking, shy, timid, timorous, tremulant, tremulous

agitated, anxious, apprehensive, disconcerted, disquieted, disturbed, funky, jittery, jumpy, nervous, panicked, panicky, panic-stricken, perturbed, skittish, uneasy, upset, worried

phobic

appalled, dismayed, startled

cowed, daunted, intimidated, unnerved

coward, cowardly, craven, gutless, lily-livered, pusillanimous

careful, cautious, heedful, prudent, unadventurous, wary