1. Find harmless/odourless/cheap chemical with some nitro groups or otherwise molecular shifty character. 2. Refill electronic air-freshener dispenser with sai

1. Find harmless/odourless/cheap chemical with some nitro groups or otherwise molecular shifty character. 2. Refill electronic air-freshener dispenser with said liquid. 3. Deploy dispenser in pre-security airport coffee shop or other likely congregation spot. 4. Purchase high-backed leather chair & fluffy white cat; Cackle maniacally.