Subway riders suffered skin and stomach irritation after a man showered them with a noxious mystery substance Saturday night, sending 14 people to the hospital.

According to police, the man got into an argument with another commuter just after 9 p.m., on a southbound 2 train at the Beverly Road station in Flatbush, Brooklyn. Things apparently escalated, and the suspect "sprayed an unknown substance" at his adversary. Both men then fled, leaving passengers caught in the splash zone to marinate in the after-effects of the offending mist. According to the FDNY, 20 people were affected by the "fumes" reported in the car, but six refused medical attention. First responders subsequently ventilated the train.

The NYPD says victims who were exposed to the substance developed skin irritation and nausea, and were subsequently treated and released from a nearby hospital. A police spokesperson classified the spray as "non-life-threatening," but could not offer any insight into what it was. As such, we don't know what made people get all rashy and barfy upon contact with the concoction, although police have noted that the patients were treated and released from a nearby hospital.

The suspect is believed to be in his 30s, between 240 and 250 lbs, and last seen wearing glasses, a black shirt, dark pants, and a dark backpack. Anyone with information in regards to this incident is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782). The public can also submit their tips by logging onto the Crime stoppers website at WWW.NYPDCRIMESTOPPERS.COM or by texting their tips to 274637 (CRIMES) then enter TIP577. All calls are strictly confidential.