Yep, all the time. Some are pretty easy to trigger consistently too; think about insects and you'll start feeling them everywhere. Ride a bus for a while or swi

Yep, all the time. Some are pretty easy to trigger consistently too; think about insects and you'll start feeling them everywhere. Ride a bus for a while or swim in a wave pool and you'll be feeling like you're moving when going to bed. Desperately try to find something you've lost and you'll start seeing it everywhere. Some senses are way easier to fool than others. For example I hear things that aren't actually there all the time, but I don't recall ever tasting something that wasn't there. I wonder how it is with smell; I do sometimes vaguely smell things (e.g. certain kinds of food, cat pee) that I then can't find anywhere, but the nose is very sensitive to trace amounts of chemicals so there isn't really a way to verify whether what you're smelling is real or imagined in that case.