I believe anythings possible. Especially if two people are in the same mind set/settings.
My first ever experience, as well as my girlfriends first expience was together at the exactly the same time holding hands laying down. We each smoked quite a nice amount of spice.
The simularities between both our journeys was more than coincidence.Same colours/patterns and Overall feel of the trip and what was around us. It could just be because we were together and expecting the same thing but still.. I would explain my view of the trip and she would finish the sentence, even tho the trip was uniqe.We are two different people and have never shared anything like that again. Our trips have been totally different every other time..
Interesting question tho.
If true we should organize a time for everyone on the forum to hit dmt and meet in hyperspace to hang out!
Peace.
SpiceMind