Reacted in fright

• Laughed blatantly
• Reacted to a horror film
• Vented, say
• Cried out in fear
• Reacted in horror
• Jumped off the page, maybe
• Let out a sharp cry
• Evinced obviously

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Scream \Scream\ (skr[=e]m), v. i. [imp. & p. p. Screamed (skr[=e]md); p. pr. & vb. n. Screaming .] [Icel. skr[ae]ma to scare, terrify; akin to Sw. skr["a]ma, Dan. skr[ae]mme. Cf. Screech .] To cry out with a shrill voice; to utter a sudden, sharp outcry, ...

Wiktionary Word definitions in Wiktionary
vb. (en-past of: scream )