Had to give a presentation on how LinkedIn could help their HR department in sourcing. I was 10 min. and built my own powerpoint presentation. They were happy I didn't have more than 20 slides, the last guy before me had over 50. I had to deliver the presentation in front of 3 guys and they interrupted me with questions the whole time, they were easy questions but I think they did that to see if I could handle interruptions and get back to presentation.