Is twitching and getting dizzy normal while smoking weed?

No

[EDIT] Haha, "No" was so blunt.

Yes, 'Twitching' and dizzyness is perfectly normal. [Quote] The effects of marijuana on the human brain are numerous and complex. The psychoactive constituent of cannabis, delta-9 THC, affects the brain in a fundamentally different way than many other drugs, such as cocaine and opiates. These drugs are associated with the dopamine pathways within the brain and are subject to high rates of abuse, as seen with self-administration experiments done with animals. [ End Quote] Try listening to music also.