Hours before an explosion rocked Chelsea on Saturday, a subway passenger yelled "BOMB!" and then counted down from five, according to police. Now the NYPD intends to charge him with falsely reporting a bomb threat—if they can find him.

The incident occurred on Saturday, September 17th, at 5:45 p.m.: According to the NYPD, the man was riding a "northbound" L train leaving the Bedford Avenue station in Williamsburg when he yelled "BOMB!" and counted down from 5. Then—wait for it—he yelled "BOOM!" Hilarious, right?

A passenger took a photograph of the man before she left the train at First Avenue.

The suspect (pictured, right) is described as being in his 20s and 5'10" and was last seen wearing a white t-shirt and blue pants.

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.