msnbc legal analyst and laisa bedroom and paul henderson is with us. this is the first time the witness has ever been involved in a jury trial and first time he has ever been considered to be an expert. >> he has testified as an expert before a number of grand jurys and i guess always a first time. this is the way you cross-examine expert witnesses. they are paid to be there. the jury understands that 37 they are educated professionals and you can lay into them and what the prosecution should have been doing and this should have been doing it yesterday with dr. di maio yesterday and they are doing it with this witness today. >> when we hear about the physicality of trayvon martin who was freshly 17 years old, 5'11" and 158 pounds and that time george zimmerman 5'8" and over 190 pounds. zimmerman fit and in shape was a soft wimp is portrayed here and trayvon is the more skilled, younger teen in the altercation that happened? >> yeah, they are trying to paint that picture. but at the end of the day, i think the prosecution is going to remind everybody th