Agostic interactions are often thought of as weak. Discuss examples where agostic interactions have been shown to displace other ligand interactions. See B.L. Conley and T.J. Williams, J. Am. Chem. Soc., 2010, 132, 1764; and S.H. Crosby, G.J. Clarkson, R.J. Deeth, and J.P. Rourke, Dalton Trans., 2011, 40, 1227.