Frilled dragon jumping at glass

Question
Hi, i have had my frilled dragon for a few months now and he seems very happy, he is currently shedding but has been for the past month and it doesnt seem to be an issue. But he has started cluimbing high in the viv and jumping at the glass front and falling all the way down where he will continue to scratch the class at the front until he climbs back up to do it again. is he trying to get out? the only reason i can think of him climbing up to jump is because he knows the viv opens halfway up and he seems to aim for this. I am using a VivExotic AX36 viv 915 x 406 x 465 mm. He is very calm when i take him out but when he goes back in he starts again. his temps are 65-100 75 mid area. and his humidity is kept around 70-80.

Answer
 Well, they have no concept of this strange clear barrier, frillies do like territory and they are sure they should be able to roam through that clear thing.  Also agamids don't like to poop where they live, many are scramblong to get to another place to eliminate.  Perhaps a nice bath, which will help him poop may calm him down.  Another thing is if he is a juvenile of about a year old or more, it could be hormones and he wants to search for the girls!  February is the start of breeding season for many agamid apecies and he just might be an early bird!