beside oneself
https://gyazo.com/b4cb522ecbf7767fe711df120304b018
source: [だがしかしの枝垂ほたるがいか太郎に我を忘れるGIF画像｜GIFMAGAZINE
1226331]
beside
oneself
overcome
with
worry
or
anger
;
distraught
:
«…で» 我を忘れて «with»
e.g.
she was beside herself with anguish.
#collocation