I think to always start out with a small line and do another one up the other nostril right away,because you will wanna do another one right away anyways so,,might as well be careful though,,i have done and been around a lotta coke and coke users over the years and snorting 100mgs is a bit risky if you don't know the quality of the coke,if it sucks then you can tell off snorting up 1/4g into 4 lines and if its fire then one line outta a 1/4 gram will coke you out pretty damn hard,,depends on quality,i have had coke where we had a 1/4 gram and chopped it up into 5 lines and each of the 5 of us did a line apiece and 5 mitutes later we are all coked up as hell,teeth grinding,numb faces,,wired out on this grade A stuff,,if we had done 100 mg...man that woulda be overamping to some people and this was not the best coke ever,,just good grade A for the price (and the purity too thinking about it) coke we payed about a bill ,,a big bill with Benjamins face on it for a ball...so who knew how good it was,altho snorting too much and gettin gtoo coked up is safer than doing too much by IV or smoking it ,and safer than doing too much heroin,but damn there must be some really shitty coke around if it takes 100mg to get a buzz off of...100 mg line to get coked up is crazy,,never had to do that much at once snorting to get high...doing it other ways i have done more than 100mg of coke at once but thats different..ya know..