4.Smoke Bombs
In Batman: Batman loves sneaking up on people. Its like his whole thing. Thats why hes got a dedicated chamber in the utility belt that he keeps topped up with smoke pellets. Just in case he needs to disappear, like, now.
In Reality: Smoke Bombs really are old news, having been used throughout military history by all sorts of races and creeds to promote panic, confusion and minimized visibility. Creating them is a simple exercise too, using only a handful of ingredients. The process is relatively safe too provided youre not making them near any naked flames. Check the video below to find out how! Smokebomb! http://youtu.be/S3dleTRYiXM