“Allah loves sneezing and hates yawning. When one of you sneezes and praises Allah Almighty, it is a duty for every Muslim who hears him to say to him, ‘May Allah have mercy on you.’ Yawning comes from Shaytan. When one of you yawns, he should control it as much as possible. When a man says, ‘Aawh!,’ Shaytan laughs at him.”
921. Abu Hurayra reported that the Prophet, may Allah bless him and grant him peace, said, “When one of you sneezes, he should say, ‘Praise be to Allah,’ and his brother or companion should say to him, ‘May Allah have mercy on you.’ Then he should say, ‘May Allah guide you and put your affairs in order.'”
p.s. Don’t sneeze and shock people, man.