ere you go, pics so it happened (by the way look at the resources and know that i sacrificed some troops on a crappy raid for you guys!)
Here is the base with a 1x1 space within walls that is an obvious tesla (note the lack of jumps spells as well):
http://i1342.photobucket.com/albums/...ps004e7815.jpg
Here is the tesla after it has presented itself:
http://i1342.photobucket.com/albums/...ps69765606.jpg
Here is that same space sans telsa (thank you archers):
http://i1342.photobucket.com/albums/...ps643c8ba0.jpg
Here is my burger king hanging out having magically appeared within the walled square:
http://i1342.photobucket.com/albums/...psc2cbbd8e.jpg
so it definitely is possible. whether it is useful is another question. it can be difficult to bait the tesla and kill it without having sacrificed a lot of troops to do so. probably more efficient to just rage the walls (assuming you are doing this because spikes have made your wall breakers useless). however, it does give you an option on a well spiked based when you've no rage spells at your disposal.