Glitched Map ?

i was playing earlier today in a pub with mostly my fellow clan mates (not exactly positive , but i think it was in delta 4) . the map was SnD Mexico . i joined late , and when i got into game , they were all freaking out in mumble about how i was under the map and going like a hundred miles an hour , but to me it appeared to be normal . it looked to me like i was just playing normally (btw i hadn't had a single beer yet) . i restarted CF and rejoined the room and everything was normal .
has this ever happened to anyone else ? if so , what maps ?

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