Tag Archives: GoPro Hero 3+

Halloween 2021: Raiders of the Lost Ark

The opening to Raiders of the Lost Ark has to be one of the best sequences in the history of cinema. The fantastic low-tech booby traps. The John Williams score. The visceral feeling of danger with icky spider webs is completely immersive and “completely immersive” is always the goal for us.

Spoiler: No, we did not roll a 30-ton ball down the stairs. But we thought about it.

One of the first hints we had on achieving this was in finding a still-frame of the idol room which we edited the pedestal out of. This we projected on the house so that we didn’t need to build the whole room. Falling rocks were animated over the image to simulate the destruction of the temple, triggered on a Sprite video player.

Still frame from Raiders of the Lost Ark

The pedestal was fabricated out of wood and carved foam with foam hardener. In the center was a pneumatic-driven lift mechanism with a Chachapoyan Fertility Idol that we bought on Etsy. Turns out you can buy anything on Etsy.

As an almost last minute addition, we introduced an ankle blaster on the stairs to simulate the blow dart scene. The compressed air blast worked really good as a scare because it was combined with a stereo blowgun sound effect that panned across the stairs. As in past years, the whole show was run on VenueMagic software.

In all, we had just over 200 kids. We’ll call it a “rebuilding” year. It was definitely the best prepared we have ever been with the setup mostly done at 3pm. Having friends Suchi and Sarath over to hand out candy also made the evening the easiest and most enjoyable we have ever had.

Halloween 2015: Yet Another Talking Skeleton

The Skeleton Awaits

Choosing a theme for Halloween is an annual challenge. Time constraints in recent years have tempted us into punting; at least to the extent that our theme becomes diluted into “do something scary.”

Technology is often the catalyst. We started off decidedly low-tech with the purchase of a sharkstooth scrim remnant. We had enough material to cover the doorway or a large prop, but using the scrim requires control over lighting near the house.

Scrim can be made opaque by shining a light on it at an oblique angle. By changing the lighting, the scrim can be made transparent; thus, revealing the area behind. To get the lighting right, you pretty much need to start out with complete darkness. Streetlights near out house make that difficult.

The solution (as if this were a problem requiring a solution) was to stretch the scrim vertically. We were then free to hide something scary above the heads of the unsuspecting trick-or-treaters. That scary thing would be a talking skeleton.

We already owned a skeleton with a servo controlled jaw, but it is heavy and advancements in skeleton technology using space-age lightweight materials made the purchase of a new skeleton an imperative. This made hanging the skeleton easier. Hanging the scrim required building a steel frame around the porch. That took way too much time.

The lighting could have been controlled in a number of kludgy, hacked-up ways, but it seemed like an investment was in order. Since we try to make the display as interactive as possible, we decided to buy VenueMagic, a software show controller. VenueMagic makes it very easy to add lighting and music cues that can be triggered by pressure mats and light beam sensors.

The triggers were attached to the 90’s era Maris hardware show controller we got off eBay a few years ago. The Maris is a pain in the butt to program, but it is easy enough to make it send a MIDI message when a trigger is tripped. VenueMagic uses the MIDI message to cue lighting on the stairs, sound effects and ultimately, the skeleton gag.

We also got additional amplification providing four 200 watt channels of audio. The dialog, music and sound effects were mixed into three channels. The dialog starts at the center channel then is spread to the side channels after a thunder and lightning cue. The thunder was set to “maximum impact” volume and that took out the small speakers in the yard. The speakers were replaced just before the witching hour.

We still had one channel left. At the last second we decided to add a cat screech next to the stairs. The cat, which took less than an hour to setup, would become the big scare of the display.

We had about 220 kids this year – a little less than last year. The display ended up being more fun than scary and the entire experience was less than a minute long. But we had fans – a pack of little girls who visited so many times that they ultimately tried to scare us. That made it worthwhile.