then change to black over about five seconds. >> a yellow reaction indicates potentially lethal impurities, a warning to drug users to avoid a bad batch. a black reaction is pure molly, or as it's called by experts, mdma. >> it is turning purple to black, relatively quickly, so that matches up well with an mdxx substance. >> mda or mdma? >> yeah. >> awesome. that's what we want. plaque psoriasis... ...isn't it time to let the... ...real you shine... ...through? introducing otezla, apremilast. otezla is not an injection, or a cream. it's a pill that treats plaque psoriasis differently. some people who took otezla saw 75% clearer skin after 4 months. and otezla's prescribing information has no requirement for routine lab monitoring.