It's bad to intentionally disrupt others.
Kevin is at a science talk and is curious about something the scientist said.
Kevin wants to ask the scientist a question.
Kevin waits until the scientist is done with the talk to ask his question at the Q&A section.
Kevin asks the question in the middle of the scientist's talk while the scientist is speaking.
The scientist will listen to Kevin's question and Kevin will get an answer.
The scientist will become annoyed and Kevin will be asked to leave the talk.