Sometimes it is better to forget something that is negative as those information will just leads you to start gossiping. However, we can't deny the fact that gossiping is part of networking, and networking is very important and fun! XD Lol!
So today, I found out that one of my managers just like grab appreciation and I just saw through his trick. And he is very good in giving himself an escape route from embarrassment. Basically, he stole my colleague idea and presented it without her consent. Then after his presentation, he purposely invited me so that he can confirmed her idea in front of her so she can't claim it her own. Luckily, she had clarified herself sooner.