Fairly regularly (and especially in Black Lion chests) I seem to be given tonics whose description says will transform me into an ooze or a moa or what have you for 15 minutes. It also says I can't attack anyone but am, presumably, still vulnerable. I think I read somewhere that enemies will ignore you, but I'm not sure about that.
So my question is, what's the point of these items? If I can't attack anyone for 15 minutes that's a good chunk of XP I'm losing out on. I also can't interact with merchants. If enemies do in fact ignore you then they would be good for a quick escape from a tough battle, but 15 minutes is far too long for that.
The only possible use I can see for these is in a big fight with lots of downed players - you could transform and go around reviving people without fear of attack. Doesn't seem that useful. Am I missing something?