Ugh.
http://www.youtube.com/watch?v=tXKCiaJsn8Q&feature=share
Yup , that's an old one. Jump is sick but i think 49'' is pushing it. He is 6'3'' and jumping bellybutton-level , low 40's seem more realistic.
Check the comments too , adarqui thinks the same. Top of vertec is 144'', at 6'3'' he must have at least 8' reach , probably a bit more. Even with only 8' reach he needs 48'' to reach the vertec top , which he clearly misses.
Id go for ~42'' too as an estimate , still impressive as hell for a 240lbs guy!