Sentence:  There was no time to pick out a penny ; I got a coin between my thumb and forefinger , leaned my elbows in a <WSD>very</WSD> natural and casual manner on top of the truck cab and flipped my little missile . 
Meaning of the word marked with <WSD> tags:  used as intensifiers; `real' is sometimes used informally for `really'; `rattling' is informal