They don't call 'em tree surgeons for nothing.

There's a definite skill to felling large trees and chipping them. It's also
very dangerous. Just ask the now one legged landscaper round our way who had
a flash of genius (not) deciding to push the cuttings through the chipper
with his leg.

Lucky for him he had the good sense not to nudge them through with his head.

If you're not suitabley qualified and careful there's many a potential
disaster looming. Get the pro's in. In this rip-off world you should find
that most tree surgeons still charge a fair and reasonable price.