Effects of Cannabis and Amphetamines on Driving Simulator Performance of Recreational Drug Users in the Natural Field http://www.grotenhermen.com/driving/krueger.pdf Thus, the main problem of driving under the influence of drugs is not the consumption of a single drug but the combination of illegal drugs with one another or with alcohol. These combinations leads to performance changes which are not expected from the use of a single drug. TLDR: алкашка - говно и для долбоебов. Мешать вещевства - признак долбоебизма.