Indeed it has! Here are a few. BMX/Skate ones with the nifty and birds taken with the 300mm and 1.4tc:
ISO 1600
http://farm6.static.flickr.com/5292/...8c673efb_z.jpg
http://farm6.static.flickr.com/5213/...05096631_z.jpg
Hooded Merganser
Would have been such a nice picture if only I had the top of the head in! I just turned to catch the end of his "flapping" and took a series of shots, none of which I was fast enough to get the head in and this was the best of the bunch
http://farm6.static.flickr.com/5092/...56c2ff66_z.jpg
Not sure...think a Japanese Heron or something?
http://farm6.static.flickr.com/5051/...4bc557ba_z.jpg