I had one very early in my dive career. My dive buddy and I were diving the Shark River Inlet in NJ. on a night dive. This being one of my first night dives I went with a large group and an Instructor. While Roman and I were exiting the inlet into the ocean, another diver pinned us against a large rock shinning his light into our eyes. We managed to extract ourselves from his grip and make it back to the exit site. While breaking down our gear the diver who pinned us came up to "thank us for the dive" and I noticed alcohol on his breath. after some questions I learned that he had been drinking before the dive. He did the dive while being intoxicated . The intoxicated diver came up from a 30 minute dive with no air what so ever. Needless to say I advised that diver If he ever came around me again I would cut his hoses.