Apache requests stuck in reading state

Has anyone seen this before? It's just very recently begun to happen on my server.

Code:

Srv	PID	Acc	        M	CPU	  SS	 Req	Conn	Child	 Slot	  Host	 VHost	Request
11-4	14987	0/3131/8823	R 	450.26	  282	 14094	0.0	27.35	 69.94 	  ?	 ?	..reading..
12-4	13741	0/23/3393	R 	5.26	  3	 1	0.0	0.51	 24.05 	  ?	 ?	..reading..

The requests are getting stuck in the ..reading.. state and are offering no information on where they're originating or what they're trying to request. They just sit there chewing up CPU and I tend to get a bunch of them at once, then they disappear.

Any thoughts?