Heidi Pratt was tortured by NBC to the point she was "convulsively throwing up" -- that's what some people on the set of "I'm a Celebrity ... Get Me Out of Here!" are telling TMZ.
We've learned Heidi was rushed to the hospital and diagnosed with a gastric ulcer, after being held with hubby Spencer Pratt in a dark room for a day and a night with only water, rice and beans. It was designed as punishment because they left the show. One cast member described their treatment this way -- "It's the same as Guantanamo Bay."