Translation:
Sfx: jolt
ぴく
Sfx: rustle
がた
Sfx: open
ぼん
Sfx: poof
ばん
Sfx: fwoosh
ぷしゅう
"I have a trick of opening my trousers before the pelvis opens!"

(Because you've told me that much I want to know whether you're wearing a bra... ")