Jason Derulo barely escaped being paralyzed after fracturing his neck in rehearsals for his upcoming European tour.

The singer tweeted, "I fractured my neck doing tumbling & acrobatics 4 tour!" The tweet was accompanied by a picture of Derulo wearing a full neck brace and hospital gown and added, "Always tryin 2 push boundaries 4 YOU! Like my new chain? ;)"

His rep says the singer fractured his vertebra after landing directly on his head while executing a move during rehearsal.

Derulo was scheduled to kick off the U.K.