TRC off... maybe u pressed a button or something something that switched your traction control off. If so, just press it again when ur done drifting like one guy said...
If VSC always on... dunno, maybe u screwed the Vehicle Stability Control and it needs checking...
On its own, the Audi R8, whether in V8 or V10 trim, is a beast of a drive but then the boys from Ingolstadt had to go and put the V10 version on a diet and give it...