The first time i had my espresso, it doesn't really work as a 'force me to stay awake drink' like what everyone told me.

The second time i ordered a double shot. I can't sleep for 2 days (seriously, i toss around my bed for few hours, then doze off for 2 hour and i am awake again)

I swear to stay away from espresso, until last week where i was damn tired. Has another double shot, but it didn't work at all. I felt asleep shortly ... and coma for like 13 hours...