Weird "Pump" in Gendarran
I think, this is part of an event and it’s there for quite some time now. If I remember correctly it’s related to steam creatures. http://wiki.guildwars2.com/wiki/Steam_creature
The Do-Not-Touch-Thumpers are much more recent.
It was there for a past LS and hasn’t been removed.
That appeared when scarlet started her clockwork invasion.
#ELEtism