Until he pulled out the slug I thought the flight path was altered... Good for the woman on the correct guess though. The balloons seemed to have more of an effect than shooting through several milk jugs though strangely enough. I feel like that is a lot more water in a jug and it'll do every time.
I don't know if you can see what each of us voted and when, and of course I forgot to say when I asked for the answer, but I was right too. Water is some really dense stuff, I had a water filled bullet stop for testing my fixes when I was a smith. I was amazed that even rifles were stopped in a short distance shooting into the thing.