Thankyou for your response sir Lion i really appreciate it 
I've noticed that if im really sleepy like my eyes were already want to close i will then observe
the closing of my eyes and keep my mind busy talking i suddenly feel a strong vibration and buzzing sound it happned
3 times but when i go for deep relaxation like i can already feel that my body is so light i can only feel weak vibration
is there something wrong ? i also find it hard to focus on visualizing
when im about to forget my body i will suddenly think about it and the floating feeling will gone what is the solution to this sir ?

I've noticed that if im really sleepy like my eyes were already want to close i will then observe
the closing of my eyes and keep my mind busy talking i suddenly feel a strong vibration and buzzing sound it happned
3 times but when i go for deep relaxation like i can already feel that my body is so light i can only feel weak vibration

is there something wrong ? i also find it hard to focus on visualizing
