of one's neck prickle with fear
脸色苍白| One's face pales
双眼瞪圆| One's eyes grow wide
双目突出| One's eyes bulge with fear
OR| One's eyes pop out
紧闭双眼| keep one's eyes firmly shut
捂住双眼| cover one's eyes
瞳孔放大|One’s pupils dilate
牙齿颤抖| One's teeth chatter
尖叫| shriek/squeal in fright
声音颤抖| One's voice tremble/shake
深咽口水| swallow hard
倒吸一口凉气| gulp/gasp
屏住呼吸| hold one's breath
结结巴巴地说| stumble over words
语无伦次地说| sputter/splutter
Your body
蜷缩| cower against/behind/under...
退缩| shrink/flinch/recoil (away) at sth
紧贴墙| flatten oneself against the wall
鸡皮疙瘩| goosebumps grow all over sb
钻进被窝| creep/crawl under the cover
用被子捂住头| pull the cover over one's face
吓呆| freeze with terror
退到墙边| back against the wall
瘫坐| sink/collapse/crumple to the floor
肌肉僵硬| One's muscles tense up
后背发凉| feel a shiver down one's spine
Your leg/foot/hand
双腿发软| One's knees weaken
跪在地上| drop/sink to one's knees
跳起来| jump/spring/leap to one's feet
挪不动双腿| be glued/rooted to the spot
吓尿| wet oneself/one's pants
吓得后退| draw back in horror
掌心出汗| One's palms sweat
手捂胸口/嘴| press one's hands on
the heart/mouth
血流加快| One's blood quickens/races/surges
血流停止| One's blood freezes/runs cold
血液凝固| One's blood congeals/clots
心咯噔一下| One's heart jolts
心猛地一跳| One's heart lurches
心跳加速| One's heart jumps/races/flutters
魂不附体| One's stomach be hollow with fear
心揪紧| One's stomach knots with fear