I have been having this debate in my head. If his goal was to create a hoax bomb, would he make it look like an actual bomb or intentionally not like an actual bomb? One could argue that by having the clock on there that it doesn't really resemble a bomb, but more of a movie-style bomb.
Kind of a fascinating article. Basic gist is that real bombs do not look like bombs.
http://hackaday.com/2015/09/21/this-...mb-looks-like/