David Lindsay, 3rd Earl of Crawford

"...Was a regent to James II of Scotland. He was a member of Clan Lindsay, a Scottish Lowland clan. At the Battle of Arbroath in 1445 the Clan Lindsay, led by the Master of Crawford, advanced with over 1000 men. Their enemy was the Clan Ogilvy who were also supported by men from the Clan Oliphant, Clan Gordon, Clan Seton and Clan Forbes of Pitsligo. The Earl, who was the Master of Crawford's father, rode between the two armies in an attempt to call a truce. However, an ill-advised Ogilvie, thinking that this was the start of the Lindsay's attack, threw his spear at the Earl, hitting him in the mouth and killing him instantly. So the battle began which went in the Clan Lindsay's favour." https://en.wikipedia.org/wiki/David_Lindsay,_3rd_Earl_of_Crawford

The Earl was indeed stuck in the mouth, but did not die at once as stated above. He was taken to Finhavan Castle and died there 3 days later. This from Clan Lindsay records.

Past Clan Lindsay Historian
Joseph W. Lindsay Haley III Esq. ATP FSA Scot.
Duni Unsil of Clan Lindsay