Souma is really susceptible to cracking up, and even memories will put him into laughing fits. But being self-conscious about this, he always tries to hide it. When he does this again at a clothing store his friend works at, the friend asks him why he does that, especially when it's so easy to tell anyway. Later, Shun also repeats the same sentiment...
That's a shock.
هذه صدمة
Wow, das schockiert mich echt!
Nunca lo imaginé.
No lo había pensado.
Le choc…
Che shock!
Não esperava por isso.
Кто бы знал...