Feeling like a terrible mummy 😂

We always jump at my 6 month old and say boo but his reaction is always to laugh, even when it's unexpected. So earlier he was in his jumper babbling to himself and I crawled up behind him and said "boo!" and he jumped and shook his arms and screamed and once he turned and realized what happened he began to cry. Ohhh my gosh I felt so bad, he never cries and I've never seen him get scared before! I honestly thought he would laugh 😭😭 Needless to say, I took him out of his jumper and held him, rocking back and forth apologizing over and over lol. After a few short minutes he was back to laughing and babbling 😄