I used floating water to shoot a firework rocket [Duration:3, White, Trails] sideways. Explosions were not rendered because they were going out of the render distance [far]
To check where they fly and explode i builded a 4 seconds timer, then i went towards the explosion, after a few seconds the fps went to 0.
When i quit to main menue i heared the explosions and the game was normal until suddenly the fps drops again.
This ticket has been marked as a duplicate of MC-5120 , in favor of the better description/information provided.