Technically speaking, an engineer is a professional practitioner of engineering, concerned with applying scientific knowledge, mathematics, and ingenuity to develop solutions for technical problems. They design materials, structures, and systems while considering the limitations imposed by practicality, regulation, safety, and cost. Here's what they (aspiring engineers included) do with normal objects during their free time. Click here to view the first image in this week's funny Facebook status updates gallery. Continue reading for a viral video of one of the coolest Halloween light shows you'll see this year.