Here is the end of Ronnie's 1000th century. (Start at 7:28 if the link doesn't take you there automatically.) The crowd is pretty rowdy.I forget how much money he lost, but when o’sullivan made century break number 1000, his final rolling cue ball fell into a pocket and he lost out on an enormous bonus against the player he just defeated with the 1000, neil robertson.
https://youtu.be/V04DCsNKimc?t=448
As Clive Everton mentions there, the high break prize was only 5000 GBP, which is not all that enormous in that context. If you notice Ronnie's last three shots, he came close to scratching (going in-off) twice and finally succeeded on the black. He frequently tries to go in-off on the last black. Usually it doesn't make any difference.