Fireball.

This was me today... well, not literally, but I did this little demo three times today. It is great. The students usually give the nice sullen teenager attitude of "I've seen this soo many times", and then the explosion happens (I do it in the dark) and they get all "Holy sh*t!" because it is always louder than they expect.

And I began to make these today for a friend who is getting married soon, as they are quite nerdy. This is pre-etching, which will happen another time.

This is a Halloween display at one of my parents' neighbors. I am a bit confused about the headless skeleton on the left. I don't know if it is intentional, or if a high school student stole his skull.