Somebody on these forums had the MRV in the provocative position, but because it was there for over 10 minutes, during which they had no circulation, then ended up worse afterwards. IIRC indefinitely worse, not just a flare up.

I don't recall who it was, but some searching around should find it. I hope I recalled it correctly.

I know when I had my MRI for TMJD, it was sloooow.