Qitzur Shulchan Arukh – 184:6-7
ו: הַמַּבְעִית אֶת חֲבֵרוֹ, כְּגוֹן שֶׁצָּעַק עָלָיו מֵאֲחֲרָיו אוֹ שֶׁנִּרְאָה לוֹ בַּאֲפֵלָה וְכַיּוֹצֵא בָזֶה, חַיָב בְּדִינֵי ֹשָמָיִם Someone who frightens his neighbor, such as he yells at him from behind, or appears to him...