Go in front of the Brain Tumbler again and press 'Y'. There are now two doors open in here, one is Sasha's Shooting Gallery and one is the Brain Tumbler Experiment, which is your mind, so go in that one.
Continue through here just as you did before to where the black shadow monster thingy is, now that you have your Psi-Blaster just shoot him once and he's gone. Time to continue the bunny trail. To the right of where the monster was behind a bush is the Purse we got the tag for the first time we were in here.
There is also a cobweb over here you can get. Go into your backpack and pull out your cobweb duster then press 'Y' next to the cobweb to grab it. Now continue to follow the bunny up a trunk of some sort where the monster used to be. As you continue on some Censors will pop out, shoot or melee them, nothing major.
The wall that these first Censors popped out of is actually a ledge you can jump up on and then run to the right and you'll come across the Trunk. Go back down and walk forward off the ledge, directly to your left when you drop down will be the Dufflebag Tag. If you're figment collecting you'll want to get back on that ledge we got the tag and head towards the ledge we just dropped off to get the tag. There are some poles you can swing on to get to a rope, to get to a vertical pole you can climb up, to another rope, to finally a ledge.
So let's stick on the lower level and continue on ahead. Up a bit further on the right is a Luggage Tag and then straight ahead is a Censor shooting stuff at you and 3 small ones come running after you when you get closer. When you get real close the one up top will move back, so shoot him when you're a decent distance away then climb up on the ledge.
Up on a ledge on your right, right before you get to the rabbit is the Luggage box. From here is another ledge you can get up, then on the opposite wall another ledge, same wall up more is another one then over to a decently sized area. Over here you'll find the Dufflebag right next to a Cobweb and several figments. Now head back to the rabbit.
A bunch of Censors and a Bomb dude will pop out, take care of them. Catch up with the rabbit again and you'll find another Cobweb directly to the left. You'll find the final emotional baggage tag not too much further ahead on the left, the Hatbox tag. Keep going and some more Censors will appear. Up a bit further before the rabbit you'll see a funny looking piece of meat on the left, give it a few punches and stuff will start to come out of it. You can't do anything with this quite yet, so just move on and a scene will soon occur.
Your goal now switches from following the rabbit, to climbing this tower. So, head to the right around back of this tower first to find a cobweb, then keep going and you'll come across the Hatbox, and only a bit further around and you'll find a Vault containing "The World Shall Taste my Eggs!" memory. Back by this vault is also one of the items that will increase your maximum astral projection. Now we can start heading up the big vine.
As you make your way up the vine you'll find that you need to have your levitation power to make it up any higher. He gives you the Oarsman's Badge so that you can get a canoe to go out on the lake and see the mind expert. So jump in the UTS and go to the lake.