(While many of these require no additional user interaction, others do and will therefore require either luck or a little SEing)

onmousemove
onmousemove
onmouseup
onmousedown
onmouseout
onbeforescriptexecute (Firefox only)
onafterscriptexecute (Firefox only)
oncontextmenu
oncut
ondrag
onclick
oncopy
onpaste
onclick
ondblclick
onblur
oninput
onkeypress
onkeyup
onkeydown